| Botanical name | Synonyms | Family | Common name |
| Abelmoschus esculentus | | Malvaceae | Ladies Finger |
| Abelmoschus ficulneus | Hibiscus ficulneus | Malvaceae | White Wild Musk Mallow |
| Abelmoschus manihot | Hibiscus manihot | Malvaceae | Sweet Hibiscus |
| Abelmoschus moschatus | Hibiscus abelmoschu | Malvaceae | Musk Mallow |
| Abroma angusta | | Sterculiaceae | Devil's Cotton |
| Abrus precatorius | | Fabaceae | Gunj |
| Abutilon hirtum var. heterotrichum | Abutilon heterotrichum, Abutilon lugardii | Malvaceae | Hairy Indian Mallow |
| Abutilon indicum | Sida indica | Malvaceae | Indian Mallow |
| Abutilon megapotamicum | | Malvaceae | Trailing Abutilon |
| Abutilon pannosum | Sida pannosa, Abutilon muticum, Abutilon glaucum | Malvaceae | Ragged Mallow |
| Abutilon persicum | | Malvaceae | Persian Mallow |
| Abutilon ranadei | | Malvaceae | Son Ghanta |
| Abutilon striatum | Abutilon pictum | Malvaceae | Painted Mallow |
| Acacia auriculiformis | | Mimosaceae | Earleaf Acacia |
| Acacia catechu | Mimosa catechu, Acacia wallichiana | Mimosaceae | Cutch Tree |
| Acacia concinna | Acacia hooperiana, Acacia sinuata, Mimosa concinna | Mimosaceae | Shikakai |
| Acacia confusa | | Mimosaceae | Formosa Acacia |
| Acacia farnesiana | Acacia acicularis, Acacia minuta, Mimosa farnesiana | Mimosaceae | Mimosa Bush |
| Acacia leucophloea | Mimosa leucophloea | Mimosaceae | White Bark Acacia |
| Acacia nilotica ssp. tomentosa | Acacia arabica var. tomentosa, Acacia nilotica var. tomentosa | Mimosaceae | Tomentose Babool |
| Acacia nilotica subsp. indica | | Mimosaceae | Babool |
| Acacia pennata | Mimosa pennata, Acacia pendata, Acacia delavayi | Mimosaceae | Climbing Acacia |
| Acacia senegal | Acacia verek | Mimosaceae | Gum Arabic Tree |
| Acacia torta | Mimosa torta, Acacia intsia, Acacia caesia | Mimosaceae | Twisted Acacia |
| Acalypha capitata | Ricinocarpus capitatus, Acalypha alnifolia , Ricinocarpus alnifolius | Euphorbiaceae | Alder Leaved Cat Tail |
| Acalypha chamaedrifolia | Acalypha reptans, Acalypha hispaniolae, Croton chamaedrifolius | Euphorbiaceae | Dwarf Cat Tail |
| Acalypha hispida | | Euphorbiaceae | Cat's Tail |
| Acalypha lanceolata var. lanceolata | Acalypha indica, Acalypha albicans, Acalypha boehmerioides, Acalypha collina, Acalypha hispida | Euphorbiaceae | Indian Copperleaf |
| Acalypha wilkesiana | | Euphorbiaceae | Copperleaf green |
| Acalypha wilkesiana | | Euphorbiaceae | Copperleaf |
| Acampe papillosa | Acampe carinata | Orchidaceae | Small Warty Acampe |
| Acampe praemorsa | | Orchidaceae | Acampe Orchid |
| Acanthospermum hispidum | | Asteraceae | Bristly Starbur |
| Acanthus ilicifolius | | Acanthaceae | Sea Holly |
| Acanthus spinosus | | Acanthaceae | Bear's Breeches |
| Acer acuminatum | Acer caudatum | Aceraceae | Tapering Leaf Maple |
| Acer caesium | Acer molle | Aceraceae | Bluish Grey Maple |
| Acer cappadocicum | Acer divergens, Acer laetum | Aceraceae | Caucasian Maple |
| Acer oblongum | | Aceraceae | Himalayan Maple |
| Achillea filipendulina | | Asteraceae | Fernleaf Yarrow |
| Achillea millefolium | Achillea lanulosa, Achillea magna | Asteraceae | Common Yarrow |
| Achimenes longiflora | | Gesneriaceae | Cupid's Bower |
| Achyranthes aspera | | Amaranthaceae | Prickly Chaff Flower |
| Achyranthes bidentata | | Amaranthaceae | Two-toothed Chaff Flower |
| Achyranthes coynei | | Amaranthaceae | Coyne's Chaff Flower |
| Acmella oleracea | Spilanthes acmella, Spilanthes oleracea | Asteraceae | Toothache Plant |
| Acmella uliginosa | Spilanthes uliginosa | Asteraceae | Marsh Para Cress |
| Acnistus arborescens | | Solanaceae | Gallinero |
| Acokanthera oppositifolia | Acokanthera longiflora, Acokanthera venenata, Cestrum oppositifolium | Apocynaceae | Poison Bush |
| Aconitum ferox | | Ranunculaceae | Himalayan Monkshood |
| Aconitum hookerii | | Ranunculaceae | Hooker's Monkshood |
| Acorus calamus | | Araceae | Sweet Flag |
| Acriopsis liliifolia | Acriopsis harae | Orchidaceae | Lily Leaf Acriopsis |
| Acrocarpus fraxinifolius | | Caesalpiniaceae | Pink Cedar |
| Actinodaphne hookeri | | Lauraceae | Pisa |
| Adansonia digitata | | Bombacaceae | Baobab |
| Adenanthera microsperma | Adenanthera pavonina var. microsperma | Mimosaceae | Bead Tree |
| Adenanthera pavonina | Adenanthera gersenii, Adenanthera polita, Corallaria parvifolia | Mimosaceae | Red Sandalwood |
| Adenium obesum | | Apocynaceae | Desert Rose |
| Adenocalymna comosum | Bignonia comosa | Bignoniaceae | Yellow Trumpet Vine |
| Adenoon indicum | | Asteraceae | Blue Sonki |
| Adenostemma lavenia | Verbesina lavenia, Adenostemma viscosum | Asteraceae | Sticky Daisy |
| Aechmea distichantha | | Bromeliaceae | Brazilian Vaseplant |
| Aechmea fasciata | | Bromeliaceae | Silver Vase Bromeliad |
| Aechmea gamosepala | | Bromeliaceae | Match Stick Plant |
| Aegiceras corniculatum | | Myrsinaceae | River Mangrove |
| Aeginetia indica | | Orobanchaceae | Forest Ghost Flower |
| Aegle marmelos | Crateva marmelos, Aegle marmelos var. mahurensis | Rutaceae | Bel |
| Aeonium spp. | | Crassulaceae | Aeonium |
| Aerides maculosa | Saccolabium speciosum, Aerides schroederi, Aerides illustris | Orchidaceae | Fox Brush Orchid |
| Aerides multiflora | Aerides affinis, Aerides lobbii, Aerides veitchii | Orchidaceae | Many Flowered Fox Brush Orchid |
| Aerva lanata | Aerva elegans, Illecebrum lanatum, Achyranthes lanata | Amaranthaceae | Mountain Knot Grass |
| Aeschynanthus lobbianus | | Gesneriaceae | Lipstick Vine |
| Aeschynanthus sikkimensis | | Gesneriaceae | Sikkim Blushwort |
| Aeschynomene americana | | Fabaceae | American Joint Vetch |
| Aeschynomene indica | Aeschynomene hispida, Aeschynomene virginica | Fabaceae | Indian Joint Vetch |
| Aesculus assamica | Aesculus punduana | Sapindaceae | East Himalayan Horse Chestnut |
| Aesculus indica | Pavia indica | Sapindaceae | Indian Horse Chestnut |
| Aganosma dichotoma | Echites caryophyllata | Apocynaceae | Malati |
| Agapanthus africanus f. albus | | Agapanthaceae | White Lily of the Nile |
| Agapanthus africanus | Agapanthus umbellatus | Agapanthaceae | Lily of the Nile |
| Agapetes macrantha | Agapetes variegata var macrantha | Ericaceae | Agapetes |
| Agapetes serpens | Pentapterygium serpens, Vaccinium serpens,Thibaudia myrtifolia | Ericaceae | Himalayan Lantern |
| Agathis robusta | Agathis palmerstonii | Araucariaceae | Kauri Pine |
| Agave americana | | Agavaceae | Century Plant |
| Agave angustifolia | Agave wrightii, Agave vivipara | Agavaceae | Caribbean Century Plant |
| Agave attenuata | | Agavaceae | Swan's Neck Agave |
| Agave sisalana | Agave rigida var. sisalana | Agavaceae | Sisal Agave |
| Ageratina adenophora | Eupatorium adenophorum, Eupatorium glandulosum | Asteraceae | Catweed |
| Ageratum conyzoides | | Asteraceae | Goat Weed |
| Ageratum houstonianum | | Asteraceae | Floss Flower |
| Aglaia elaeagnoidea | Aglaia roxbughiana, Milnea roxburghiana, Nemedra elaeagnoidea | Meliaceae | Priyangu |
| Agrimonia pilosa | Agrimonia dahurica | Rosaceae | Hairy Agrimony |
| Agrostemma githago | | Caryophyllaceae | Corn Cockle |
| Ailanthus excelsa | | Simaroubaceae | Indian Tree of Heaven |
| Ainsliaea aptera | | Asteraceae | Wingless Ainsliaea |
| Ajuga lupulina | | Lamiaceae | Himalayan Bugle |
| Alangium alpinum | Marlea begoniifolia var. alpina | Alangiaceae | Mountain Alangium |
| Alangium platanifolium | | Alangiaceae | Lobed-leaf Alangium |
| Alangium salviifolium | | Alangiaceae | Sage Leaved Alangium |
| Albizia amara subsp. amara | Mimosa amara | Mimosaceae | Krishna Siris |
| Albizia chinensis | | Mimosaceae | Chinese Albizia |
| Albizia julibrissin | Acacia julibrissin, Acacia mollis, Mimosa arborea | Mimosaceae | Silktree Mimosa |
| Albizia lebbeck | | Mimosaceae | Siris Tree |
| Albizia lucidior | Albizia lucida, Inga lucidior, Mimosa lucida | Mimosaceae | Potka Siris |
| Albizia procera | | Mimosaceae | White Siris |
| Alcea rosea | | Malvaceae | Double Hollyhock |
| Alcea rosea | | Malvaceae | Hollyhock |
| Aletris pauciflora | Aletris nepalensis, Stachyopogon pauciflorus, Tofieldia nepalensis | Liliaceae | Few Flowered Colic-Root |
| Aleurites moluccanus | Aleurites javanicus, Aleurites pentaphyllus, Aleurites trilobus, Jatropha moluccana | Euphorbiaceae | Candle Nut |
| Allamanda blanchetii | Allamanda violacea | Apocynaceae | Purple Allamanda |
| Allamanda cathartica | | Apocynaceae | Golden Trumpet Vine |
| Allardia glabra | Waldheimia glabra | Asteraceae | Smooth Allardia |
| Allium ampeloprasum | | Alliaceae | Elephant Garlic |
| Allium cepa | | Alliaceae | Onion |
| Allium cernuum | | Alliaceae | Nodding Onion |
| Allium hookeri | | Alliaceae | Maroi Napakpi |
| Allium humile | Allium govanianum, Allium nivale | Alliaceae | Small Alpine Onion |
| Allium schoenoprasum | | Alliaceae | Chives |
| Allium tuberosum | | Alliaceae | Garlic Chives |
| Allium wallichii | | Alliaceae | Himalaya Onion |
| Allmania nodiflora | Celosia nodiflora, Chamissoa albida | Amaranthaceae | Node Flower Allmania |
| Allophylus cobbe | Rhus cobbe | Sapindaceae | Indian Allophylus |
| Alloteropsis cimicina | Coridochloa cimicina, Panicum cimicinum, Axonopus cimicinus | Poaceae | Summer Grass |
| Alnus nepalensis | | Betulaceae | Nepal Alder |
| Alocasia macrorhiza | Alocasia indica | Araceae | Giant Taro |
| Aloe deltoideodonta | | Asphodelaceae | Delta-shaped Aloe |
| Aloe humilis | | Asphodelaceae | Spider Aloe |
| Aloe vera | Aloe barbadensis, Aloe indica, Aloe vulgaris | Asphodelaceae | Aloe Vera |
| Alpinia calcarata | | Zingiberaceae | Snap Ginger |
| Alpinia purpurata | | Zingiberaceae | Red Ginger |
| Alpinia zerumbet | | Zingiberaceae | Shell Ginger |
| Alpinia zerumbet 'Variegata' | | Zingiberaceae | Variegated Shell Ginger |
| Alseodaphne semicarpifolia | Alseodaphne semecarpifolia | Lauraceae | Nelthare |
| Alstonia macrophylla | | Apocynaceae | Batino |
| Alstonia scholaris | | Apocynaceae | Devil Tree |
| Alstroemeria spp. | | Amaryllidaceae | Peruvian Lily |
| Alternanthera dentata | | Amaranthaceae | Joy Weed |
| Alternanthera ficoidea | Gomphrena ficoidea, Alternanthera tenella | Amaranthaceae | Sanguinarea |
| Alternanthera paronychioides | | Amaranthaceae | Smooth Chaff Flower |
| Alternanthera philoxeroides | | Amaranthaceae | Alligator Weed |
| Alternanthera pungens | | Amaranthaceae | Khaki Weed |
| Alternanthera sessilis | | Amaranthaceae | Sessile Joyweed |
| Alysicarpus belgaumensis | | Fabaceae | Belgaum Alyce Clover |
| Alysicarpus bupleurifolius | Hedysarum bupleurifolium, Hedysarum gramineum | Fabaceae | Sweet Alyce Clover |
| Alysicarpus longifolius | Hedysarum longifolium | Fabaceae | Long Leaved Alyce Clover |
| Alysicarpus pubescens | | Fabaceae | Bicolor Alyce Clover |
| Alysicarpus tetragonolobus | | Fabaceae | Red Alyce Clover |
| Alysicarpus vaginalis | Alysicarpus rupicola, Alysicarpus nummularifolius, Hedysarum cylindricum | Fabaceae | Alyce Clover |
| Amaranthus caudatus | | Amaranthaceae | Love Lies Bleeding |
| Amaranthus cruentus 'Hot Biscuits' | Amaranthus paniculatus | Amaranthaceae | Hot Biscuits Amaranth |
| Amaranthus spinosus | | Amaranthaceae | Prickly Amaranth |
| Amaranthus viridis | Amaranthus gracilis, Amaranthus polystachyus, Euxolus viridis | Amaranthaceae | Green Amaranth |
| Amherstia nobilis | | Caesalpiniaceae | Pride of Burma |
| Amischophacelus axillaris | Tonningia axillaris | Commelinaceae | Creeping Cradle Plant |
| Amischotolype mollissima | Campelia mollissima, Forrestia mollissima, Forrestia marginata | Commelinaceae | Graceful Forrestia |
| Ammannia baccifera | Ammannia vescicatoria, Ammannia aegyptiaca | Lythraceae | Blistering Ammannia |
| Ammannia multiflora | Ammannia parviflora, Suffrenia dichotom | Lythraceae | Many Flowered Ammannia |
| Amorphophallus commutatus | | Araceae | Dragon Stalk Yam |
| Ampelocissus latifolia | | Vitaceae | Wild Grape |
| Anacardium occidentale | | Anacardiaceae | Cashew |
| Anagallis arvensis ssp. foemina | | Primulaceae | Blue Pimpernel |
| Ananas comosus | Ananas ananas, Bromelia ananas, Bromelia comosa | Bromeliaceae | Pineapple |
| Anaphalis busua | Anaphalis arenosa, Anaphalis surculosa, Gnaphalium busua | Asteraceae | Tall Pearly Everlasting |
| Anaphalis margaritacea | | Asteraceae | Western Pearly Everlasting |
| Anaphalis nepalensis | | Asteraceae | Nepal Pearly Everlasting |
| Anaphalis triplinervis | Antennaria triplinervis | Asteraceae | Woolly Pearly Everlasting |
| Andrographis echioides | Justicia echioides, Indoneesiella echioides | Acanthaceae | False Waterwillow |
| Andrographis paniculata | Justicia paniculata | Acanthaceae | Kariyat |
| Androsace lanuginosa | | Primulaceae | Woolly Rock Jasmine |
| Androsace rotundifolia | | Primulaceae | Roundleaf Rock Jasmine |
| Androsace sarmentosa | | Primulaceae | Common Rock Jasmine |
| Androsace sempervivoides | | Primulaceae | Evergreen Rock Jasmine |
| Androsace studiosorum | Androsace primuloides, Androsace sarmentosa var. primuloides | Primulaceae | Primrose Rock Jasmine |
| Anemone coronaria | | Ranunculaceae | Poppy Anemone |
| Anemone obtusiloba | | Ranunculaceae | Blue Himalayan Anemone |
| Anemone obtusiloba | | Ranunculaceae | Himalayan Thimbleweed |
| Anemone pavonina | | Ranunculaceae | Peacock Anemone |
| Anemone rivularis | | Ranunculaceae | River Anemone |
| Anemone tetrasepala | | Ranunculaceae | Four Petal Anemone |
| Anemone vitifolia | Anemone elegans | Ranunculaceae | Grape Leaf Anemone |
| Anemopaegma chamberlaynii | Bignonia chamberlaynii | Bignoniaceae | Trumpet Vine |
| Anethum graveolens | | Apiaceae | Dill |
| Angelonia angustifolia 'Alba' | | Scrophulariaceae | White Angelonia |
| Angelonia angustifolia | | Scrophulariaceae | Narrowleaf Angelonia |
| Anisochilus carnosus | Lavandula carnosa, Plectranthus strobilifer | Lamiaceae | Kapurli |
| Anisomeles heyneana | | Lamiaceae | Western Hill Catmint |
| Anisomeles indica | Nepeta indica, Anisomeles ovata | Lamiaceae | Indian Catmint |
| Anisomeles malabarica | Anisomeles salviifolia, Nepeta malabarica | Lamiaceae | Malabar Catmint |
| Annona reticulata | Annona humboldtiana, Annona humboldtii | Annonaceae | Netted Custard Apple |
| Annona squamosa | | Annonaceae | Sugar Apple |
| Anogeissus acuminata | Anogeissus pendula, Conocarpus acuminatus | Combretaceae | Buttontree |
| Anogeissus latifolia | | Combretaceae | Axle Wood Tree |
| Anthemis arvensis | | Asteraceae | Corn Chamomile |
| Anthogonium gracile | Anthogonium griffithii, Anthogonium corydaloides | Orchidaceae | Slender Anthogonium |
| Anthurium andraeanum | | Araceae | Flamingo Flower |
| Antigonon leptopus 'Alba' | | Polygonaceae | White Coral Vine |
| Antigonon leptopus | | Polygonaceae | Coral Vine |
| Antirrhinum majus | | Scrophulariaceae | Dog Flower |
| Aphanamixis polystachya | Aglaia polystachya, Amoora rohituka, Andersonia rohituka | Meliaceae | Pithraj Tree |
| Apium graveolens | | Apiaceae | Celery |
| Apluda mutica | Apluda aristata, Apluda varia | Poaceae | Mauritian Grass |
| Aponogeton natans | Saururus natans | Aponogetonaceae | Floating Lace Plant |
| Aporocactus flagelliformis | | Cactaceae | Rat Tail Cactus |
| Aptenia cordifolia | | Aizoaceae | Baby Sun Rose |
| Aquilegia pubiflora | | Ranunculaceae | Himalayan Columbine |
| Arabidopsis himalaica | Arabis himalaica, Arabis rupestre, Sisymbrium himalaicum | Brassicaceae | Himalayan Rock-Cress |
| Arachis hypogaea | | Fabaceae | Groundnut |
| Arachnis flos-aeris | Arachnis flosaeris | Orchidaceae | Spider Orchid |
| Arctotis venusta | | Asteraceae | Blue Eyed African Daisy |
| Ardisia macrocarpa | | Myrsinaceae | Himalayan Coralberry |
| Ardisia solanacea | Ardisia elliptica, Ardisia humilis | Myrsinaceae | Shoebutton Ardisia |
| Areca catechu | | Arecaceae | Betel Palm |
| Arenaria serpyllifolia | | Caryophyllaceae | Thyme-Leaved Sandwort |
| Argemone mexicana | | Papaveraceae | Mexican Prickly Poppy |
| Argyreia cuneata | Convolvulus cuneatus | Convolvulaceae | Purple Morning Glory |
| Argyreia elliptica | Lettsomia elliptica | Convolvulaceae | Oval Leaved Silverweed |
| Argyreia hookeri | | Convolvulaceae | Hooker's Woodrose |
| Argyreia nervosa | Argyreia speciosa, Convolvulus nervosus, Lettsomia nervosa | Convolvulaceae | Elephant Creeper |
| Argyreia sericea | | Convolvulaceae | Silky Morning Glory |
| Argyreia strigosa | Argyrela Swtosa, lpomoea strigosa | Convolvulaceae | Bristled Woodrose |
| Ariopsis peltata | Remusatia vivipara | Araceae | Shield Leaf Ariopsis |
| Arisaema costatum | | Araceae | Striped Cobra Lily |
| Arisaema erubescens | | Araceae | Blushing Cobra Lily |
| Arisaema flavum | | Araceae | Yellow Cobra Lily |
| Arisaema griffithii | | Araceae | Griffith's Cobra Lily |
| Arisaema jacquemontii | | Araceae | Jacquemont's Cobra Lily |
| Arisaema murrayi | | Araceae | Murray's Cobra Lily |
| Arisaema nepenthoides | | Araceae | Cobra Lily |
| Arisaema propinquum | | Araceae | Wallich's Cobra Lily |
| Arisaema tortuosum | | Araceae | Whipcord Cobra Lily |
| Arisaema utile | | Araceae | Sikkim Cobra Lily |
| Aristolochia elegans | | Aristolochiaceae | Calico Flower |
| Aristolochia indica | | Aristolochiaceae | Indian Birthwort |
| Aristolochia ornithocephala | | Aristolochiaceae | Bird's Head Birthwort |
| Aristolochia ringens | | Aristolochiaceae | Gaping Dutchman's Pipe |
| Arnebia benthamii | | Boraginaceae | Himalayan Arnebia |
| Arnicratea grahamii | Hippocratea grahamii, Reissantia grahamii | Celastraceae | Running Straggler |
| Artabotrys hexapetalus | Annona hexapetala, Artabotrys odoratissimus | Annonaceae | Hari Champa |
| Artemisia nilagirica | Artemisia vulgaris, Artemisia vulgaris var. nilagirica | Asteraceae | Indian Wormwood |
| Artemisia stelleriana | | Asteraceae | Dusty Miller |
| Artocarpus altilis | | Moraceae | Breadfruit |
| Artocarpus heterophyllus | Artocarpus integer, Artocarpus integrifolia, Artocarpus jaca | Moraceae | Jackfruit |
| Artocarpus lakoocha | Artocarpus lacucha, Artocarpus ficifolius | Moraceae | Lakoocha |
| Arundina graminifolia | Arundina bambusifolia, Bletia graminifolia, Arundina speciosa | Orchidaceae | Bamboo Orchid |
| Asclepias curassavica | | Asclepiadaceae | Scarlet Milkweed |
| Asclepias physocarpa | | Asclepiadaceae | Balloon Plant |
| Ascocenda spp. | | Orchidaceae | Ascocenda Princess Mikasa |
| Ascocentrum ampullaceum | Saccolabium ampullaceum, Saccolabium rubrum | Orchidaceae | Purple Ascocentrum |
| Aspalathus linearis | | Fabaceae | Red Bush Tea |
| Asparagus densiflorus | Asparagus aethiopicus | Asparagaceae | Asparagus Fern |
| Asparagus officinalis | | Asparagaceae | Garden Asparagus |
| Asparagus racemosus | Asparagus volubilis | Asparagaceae | Satawari |
| Asparagus retrofractus | Protasparagus retrofractus | Asparagaceae | Ming Fern |
| Asparagus setaceus | | Asparagaceae | Lacy Asparagus Fern |
| Aspidopterys cordata | Hiraea cordata, Hiptage cordata | Malpighiaceae | Bokadvel |
| Aster ageratoides | Aster trinervius subsp. ageratoides | Asteraceae | Whiteweed Aster |
| Aster albescens | Microglossa albescens | Asteraceae | Fading Himalayan Aster |
| Aster amellus | | Asteraceae | Italian Aster |
| Aster diplostephioides | | Asteraceae | Creeping Aster |
| Astragalus floridus | | Fabaceae | Himalayan Milk Vetch |
| Astragalus himalayanus | | Fabaceae | Himalayan Astragalus |
| Asystasia dalzelliana | Asystasia violacea | Acanthaceae | Violet Asystasia |
| Asystasia gangetica | | Acanthaceae | Ganges Primrose |
| Asystasia indica | | Acanthaceae | Indian Asystasia |
| Asystasia intrusa | | Acanthaceae | Common Asystasia |
| Atalantia racemosa | | Rutaceae | Bombay Atalantia |
| Atalantia wightii | Atalantia ceylanica | Rutaceae | Nilgiri Atalantia |
| Atropa belladonna | Atropa bella-donna | Solanaceae | Belladonna |
| Avena sativa | | Poaceae | Common Oat |
| Averrhoa bilimbi | | Oxalidaceae | Bilimbi |
| Averrhoa carambola | | Oxalidaceae | Star Fruit |
| Avicennia marina | Sceura marina | Acanthaceae | Grey Mangrove |
| Avicennia officinalis | | Acanthaceae | Indian Mangrove |
| Azadirachta indica | Melia azadirachta, Antelaea azadirachta | Meliaceae | Neem |
| Baccharoides anthelmintica | Conyza anthelmintica, Vernonia anthelmintica | Asteraceae | Ironweed |
| Bacopa monnieri | | Scrophulariaceae | Brahmi |
| Balanophora dioica | | Balanophoraceae | Himalayan Balanophora |
| Baliospermum montanum | Baliospermum axillare, Baliospermum solanifolium, Jatropha montana | Euphorbiaceae | Red Physic Nut |
| Bambusa vulgaris | | Poaceae | Bamboo |
| Baptisia australis | | Fabaceae | Blue Wild Indigo |
| Barbarea intermedia | | Brassicaceae | Medium Winter-cress |
| Barleria cristata 'Lavender Lace' | | Acanthaceae | Striped Philippine Violet |
| Barleria cristata | | Acanthaceae | Philippine Violet |
| Barleria cuspidata | | Acanthaceae | Spiny Barleria |
| Barleria grandiflora | | Acanthaceae | Grand Barleria |
| Barleria involucrata | | Acanthaceae | Mayurpankh |
| Barleria lawii | | Acanthaceae | Law's Barleria |
| Barleria longiflora | | Acanthaceae | Long Flowered Barleria |
| Barleria lupulina | | Acanthaceae | Hophead |
| Barleria montana | Barleria purpurea | Acanthaceae | Mountain Barleria |
| Barleria prattensis | | Acanthaceae | Pink Barleria |
| Barleria prionitis | | Acanthaceae | Porcupine Flower |
| Barleria repens | | Acanthaceae | Red Barleria |
| Barleria terminalis | | Acanthaceae | Blue Barleria |
| Barringtonia acutangula | Barringtonia spicata, Eugenia acutangula | Lecythidaceae | Barringtonia |
| Barringtonia asiatica | Barringtonia speciosa | Lecythidaceae | Sea Poison Tree |
| Basella alba var. rubra | | Basellaceae | Malabar Spinach |
| Bauhinia acuminata | | Caesalpiniaceae | Dwarf White Orchid Tree |
| Bauhinia foveolata | | Caesalpiniaceae | Pore Leaved Bauhinia |
| Bauhinia galpinii | | Caesalpiniaceae | Red Orchid Tree |
| Bauhinia glauca | Bauhinia tenuiflora | Caesalpiniaceae | Glaucous Climbing Bauhinia |
| Bauhinia hookeri | Lysiphyllum hookeri | Caesalpiniaceae | Mountain Ebony |
| Bauhinia malabarica | | Caesalpiniaceae | Malabar Bauhinia |
| Bauhinia purpurea | | Caesalpiniaceae | Purple Orchid Tree |
| Bauhinia racemosa | | Caesalpiniaceae | Bidi Leaf Tree |
| Bauhinia roxburghiana | Bauhinia retusa , Bauhinia semla | Caesalpiniaceae | Roxburgh's Bauhinia |
| Bauhinia tomentosa | | Caesalpiniaceae | Yellow Orchid Tree |
| Bauhinia vahlii | Bauhinia racemosa, Phanera vahlii | Caesalpiniaceae | Maloo Creeper |
| Bauhinia variegata | | Caesalpiniaceae | Orchid Tree |
| Bauhinia variegata | | Caesalpiniaceae | White-Purple Orchid Tree |
| Bauhinia variegata var. candida | Bauhinia alba, Bauhinia variegata var. alboflava | Caesalpiniaceae | White Orchid Tree |
| Bauhinia x blakeana | | Caesalpiniaceae | Hong Kong Orchid Tree |
| Beaumontia grandiflora | Echites grandiflora | Apocynaceae | Nepal Trumpet Flower |
| Begonia coccinea | | Begoniaceae | Angel Wing Begonia |
| Begonia concanensis | | Begoniaceae | Konkan Begonia |
| Begonia crenata | | Begoniaceae | Common Begonia |
| Begonia grandis | | Begoniaceae | Hardy Begonia |
| Begonia megaptera | | Begoniaceae | Large Winged Begonia |
| Begonia 'Nonstop Red' | | Begoniaceae | Begonia Nonstop Red |
| Begonia phrixophylla | | Begoniaceae | Shimpli |
| Begonia picta | | Begoniaceae | Painted Leaf Begonia |
| Begonia 'Red Cascade' | | Begoniaceae | Hanging Basket Red Begonia |
| Begonia roxburghii | Begonia malabarica | Begoniaceae | East Himalayan Begonia |
| Begonia sempeflorens | | Begoniaceae | Begonia Fair Lady |
| Begonia tessaricarpa | | Begoniaceae | Rebe |
| Begonia tuberosa 'Ruffled Yellow' | | Begoniaceae | Ruffled Yellow Begonia |
| Begonia x semperflorens-cultorum | | Begoniaceae | Wax Begonia |
| Bellis perennis | | Asteraceae | English Daisy |
| Benincasa hispida | Benincasa cerifera, Cucurbita hispida | Cucurbitaceae | White Gourd |
| Berberis aristata/chitria | | Berberidaceae | Chitra |
| Berberis erythroclada | | Berberidaceae | Ridged Stem Barberry |
| Berberis koehneana | Berberis koehniana | Berberidaceae | Koehne Barberry |
| Berberis lycium | | Berberidaceae | Indian Barberry |
| Bergenia ciliata | | Saxifragaceae | Frilly Bergenia |
| Bergera koenigii | Murraya koenigii, Chalcas koenigii | Rutaceae | Curry Leaf |
| Berrya cordifolia | Espera cordifolia, Berrya ammonilla | Tiliaceae | Trincomalee Wood |
| Beta vulgaris ssp. maritima | Beta maritima, Beta bengalensis, Beta vulgaris var. orientalis | Chenopodiaceae | Sea Beet |
| Betula utilis | Betula bhojpattra | Betulaceae | Bhoj Patra Tree |
| Bidens biternata | Coreopsis biternata | Asteraceae | Spanish Needles |
| Bidens pilosa | | Asteraceae | Beggar Tick |
| Billbergia pyramidalis | | Bromeliaceae | Foolproof Plant |
| Billbergia spp. | | Bromeliaceae | Billbergia |
| Biophytum reinwardtii | Oxalis reinwardtii | Oxalidaceae | Reinwardt's Tree Plant |
| Biophytum sensitivum | | Oxalidaceae | Little Tree Plant |
| Bischofia javanica | Bischofia trifoliata | Euphorbiaceae | Bishop Wood |
| Bistorta affinis | Persicaria affinis, Polygonum affine | Polygonaceae | Himalayan Fleeceflower |
| Bistorta amplexicaulis | Polygonum amplexicaule, Persicaria amplexicaulis, Polygonum amplexicaule var. speciosum | Polygonaceae | Mountain Fleeceflower |
| Bistorta millettii | | Polygonaceae | Crimson Knotweed |
| Bistorta vaccinifolia | Persicaria vaccinifolia, Polygonum vaccinifoliu | Polygonaceae | Rose Carpet Knotweed |
| Bixa orellana | | Bixaceae | Lipstick Tree |
| Blainvillea acmella | Verbesina acmella, Blainvillea latifolia, Blainvillea rhomboidea | Asteraceae | Para Cress Flower |
| Blepharis maderaspatensis | | Acanthaceae | Creeping Blepharis |
| Blumea lacera | | Asteraceae | Kakronda |
| Blumea mollis | Blumea wightiana, Blumea parvifolia, Erigeron molle | Asteraceae | Soft Blumea |
| Blumea oxyodonta | | Asteraceae | Spiny Leaved Blumea |
| Blumea paniculata | | Asteraceae | Panicled Blumea |
| Boehmeria macrophylla | Boehmeria penduliflora, Boehmeria platyphylla | Urticaceae | False Nettle |
| Boenninghausenia albiflora | Ruta albiflora | Rutaceae | White Himalayan Rue |
| Boerhavia diffusa | Boerhavia repens, Boerhavia coccinea | Nyctaginaceae | Red Spiderling |
| Boerhavia erecta | | Nyctaginaceae | Erect Spiderling |
| Bombax ceiba | Salmalia malabarica | Bombacaceae | Silk Cotton Tree |
| Bombax insigne | Salmalia insignis | Bombacaceae | Showy Silk Cotton Tree |
| Borassus flabellifer | | Arecaceae | Palmyra Palm |
| Boswellia serrata | Boswellia glabra, Boswellia thurifera, Bursera thurifera | Burseraceae | Indian Olibanum |
| Bougainvillea glabra | | Nyctaginaceae | Bougainvillea |
| Bougainvillea spectabilis | | Nyctaginaceae | Great Bougainvillea |
| Brachychiton australis | Brachychiton platanoides, Sterculia trichosiphon, Trichosiphon australe | Sterculiaceae | Broad Leaved Bottle Tree |
| Brachycome Iberidifolia | | Asteraceae | Swan River Daisy |
| Bracteantha bracteata | | Asteraceae | Paper Daisy |
| Brassica juncea | | Brassicaceae | Mustard |
| Brassica juncea var. rugosa | Brassica juncea var. capitata, Brassica rugosa, Sinapis rugosa | Brassicaceae | Cabbage Leaf Mustard |
| Brassica napus var. napus | | Brassicaceae | Gobhi Sarson |
| Brassica oleracea var. botrytis | | Brassicaceae | Cauliflower |
| Brassica oleracea var. italica | | Brassicaceae | Broccoli |
| Brassica oleracea var. sabellica | Brassica oleracea var. acephala | Brassicaceae | Ornamental Cabbage |
| Breynia retusa | Phyllanthus retusus, Breynia patens | Phyllanthaceae | Cup Saucer Plant |
| Bridelia hamiltoniana | | Euphorbiaceae | Hamilton's Bridelia |
| Bridelia retusa | | Euphorbiaceae | Spinous Kino Tree |
| Broussonetia papyrifera | Morus papyrifera, Papyrius papyriferus | Moraceae | Paper Mulberry |
| Browallia americana | Browallia elata | Solanaceae | Bush Violet |
| Brownea coccinea | Brownea capitella, Brownea latifolia | Caesalpiniaceae | Scarlet Flame Bean |
| Brugmansia suaveolens | Datura suaveolens | Solanaceae | Angel's Trumpet |
| Brugmansia versicolor | Datura mollis | Solanaceae | Peach Angel's Trumpet |
| Bruguiera cylindrica | Rhizophora cylindrica, Bruguiera caryophylloides | Rhizophoracea | White Burma Mangrove |
| Bruguiera gymnorrhiza | | Rhizophoracea | Burma Mangrove |
| Brunfelsia americana | Brunfelsia undulata | Solanaceae | Lady of the Night |
| Brunfelsia pauciflora | Brunfelsia calycina, Franciscea pauciflora, Brunfelsia pauciflora var. calycin | Solanaceae | Yesterday Today and Tomorrow |
| Brya ebenus | Aspalathus ebenus | Fabaceae | Jamaican Ebony |
| Buchanania lanzan | Buchanania latifolia, Chironjia sapida | Anacardiaceae | Chironji Tree |
| Buchnera hispida | | Scrophulariaceae | Karanji |
| Buddleja asiatica | | Buddlejaceae | White Butterfly Bush |
| Buddleja davidii | | Buddlejaceae | Butterfly Bush |
| Buddleja macrostachya | Buddleja cylindrostachya | Buddlejaceae | Long Spiked Butterfly Bush |
| Buddleja madagascariensis | Buddleia madagascariensis | Buddlejaceae | Madagascar Butterfly Bush |
| Bulbophyllum careyanum | Anisopetalum careyanum, Phyllorkis purpurea, Pleurothallis purpurea | Orchidaceae | Carey's Bulbophyllum |
| Bulbophyllum cariniflorum | Bulbophyllum densiflorum, Bulbophyllum pantlingii, Bulbophyllum flavidum | Orchidaceae | Keeled Flower Bulbophyllum |
| Bulbophyllum crassipes | Bulbophyllum careyanum var. crassipes, Phyllorchis crassipes | Orchidaceae | Thick Spurred Bulbophyllum |
| Bulbophyllum fimbriatum | Cirrhopetalum fimbriatum, Phyllorchis fimbriata | Orchidaceae | Fringed Bulbophyllum |
| Bulbophyllum umbellatum | Bulbophyllum annamicum | Orchidaceae | Umbrella Bulbophyllum |
| Bupleurum candollei | | Apiaceae | Himalayan Thorowax |
| Burmannia coelestis | Burmannia caelestis | Burmanniaceae | Indian Bluethread |
| Butea monosperma | Butea frondosa, Erythrina monosperma, Plaso monosperma | Fabaceae | Flame of the Forest |
| Cadaba fruticosa | Cleome fruticosa | Capparaceae | Indian Cadaba |
| Caesalpinia bonduc | Caesalpinia crista, Caesalpinia bonducella, Guilandina bonduc | Caesalpiniaceae | Fever Nut |
| Caesalpinia coriaria | | Caesalpiniaceae | Divi Divi |
| Caesalpinia cucullata | Mezoneuron cucullatum | Caesalpiniaceae | Ragi |
| Caesalpinia decapetala | | Caesalpiniaceae | Mysore Thorn |
| Caesalpinia ferrea | | Caesalpiniaceae | Brazilian Ironwood |
| Caesalpinia pulcherrima forma flava | | Caesalpiniaceae | Peacock Flower yellow |
| Caesalpinia pulcherrima | | Caesalpiniaceae | Peacock Flower |
| Caesalpinia sappan | Biancaea sappan | Caesalpiniaceae | Sappan Wood |
| Caesulia axillaris | Meyera orientalis | Asteraceae | Pink Node Flower |
| Cajanus cajan | Cytisus cajan, Cajanus indicus, Cajanus flavus | Fabaceae | Arhar |
| Cajanus lineatus | Atylosia lineata | Fabaceae | Wild Toor |
| Calacanthus grandiflorus | | Scrophulariaceae | Large Flowered Calacanthus |
| Calanthe sylvatica | Calanthe masuca | Orchidaceae | Forest Calanthe |
| Calanthe tricarinata | | Orchidaceae | Monkey Orchid |
| Calceolaria crenatiflora | | Scrophulariaceae | Pocket Book Plant |
| Calceolaria tripartita | Calceolaria gracilis, Calceolaria mexicana | Scrophulariaceae | Slipper Flower |
| Calendula officinalis | | Asteraceae | Calendula |
| Callaeum macropterum | Mascagnia macroptera, Hiraea macroptera | Malpighiaceae | Yellow Butterfly Vine |
| Calliandra brevipes | Anneslia brevipes, Calliandra selloi | Mimosaceae | Pink Powder Puff |
| Calliandra emarginata | | Mimosaceae | Dwarf Powder Puff |
| Calliandra haematocephala | | Mimosaceae | Powder Puff |
| Callicarpa longifolia | | Verbenaceae | Long Leaved Beauty Berry |
| Callicarpa macrophylla | Callicarpa incana, Callicarpa tomentosa | Verbenaceae | Urn-Fruit Beauty Berry |
| Callistemon salignus | | Myrtaceae | White Bottle Brush |
| Callistemon viminalis | | Myrtaceae | Bottle Brush |
| Callistephus chinensis | | Asteraceae | China Aster |
| Calophyllum inophyllum | | Clusiaceae | Sultan Champa |
| Calopogonium mucunoides | Calopogonium brachycarpum, Calopogonium orthocarpum, Stenolobium brachycarpum | Fabaceae | Calopo |
| Calotropis gigantea | | Asclepiadaceae | Crown Flower |
| Calotropis procera | | Asclepiadaceae | Rubber Bush |
| Caltha palustris var. himalensis | | Ranunculaceae | Marsh Marigold |
| Calycopteris floribunda | | Combretaceae | Paper Flower Climber |
| Calyptocarpus vialis | | Asteraceae | Straggler Daisy |
| Camellia japonica | | Theaceae | Camellia |
| Camellia sinensis | | Theaceae | Tea |
| Campanula cochleariifoli | | Campanulaceae | Fairies Thimbles |
| Campanula dimorphantha | Campanula bentham, Campanula canescens | Campanulaceae | Purple Bellflower |
| Campanula latifolia | | Campanulaceae | Large Bellflower |
| Campanula pallida | Campanula colorata, Campanula himalayensis, Campanula hoffmeisteri, Campanula ramulosa | Campanulaceae | Pale Bellflower |
| Campsis grandiflora | | Bignoniaceae | Chinese Trumpet Creeper |
| Campsis radicans 'Flava' | | Bignoniaceae | Yellow Trumpet Creeper |
| Campsis radicans | | Bignoniaceae | Trumpet Creeper |
| Cananga odorata | Uvaria odorata | Annonaceae | Ylang Ylang |
| Cananga odorata var. fruticosa | Cananga fruticosa, Cananga kirkii | Annonaceae | Dwarf Ylang Ylang |
| Canavalia ensiformis | | Fabaceae | Horse Bean |
| Canavalia gladiata | Dolichos gladiatus | Fabaceae | Sword Bean |
| Canavalia lineata | Canavalia lineata, Canavalia maritima | Fabaceae | Beach Bean |
| Cannabis sativa | | Cannabaceae | Marijuana |
| Canna indica | | Cannaceae | Indian Shot |
| Canna spp. | | Cannaceae | Canna |
| Canscora diffusa | | Gentianaceae | Kilwar |
| Canscora khandalensis | | Gentianaceae | Khandala Canscora |
| Canscora perfoliata | | Gentianaceae | Pierced Leaf Canscora |
| Canthium coromandelicum | Canthium parviflorum, Plectronia parviflora, Paederia valli-kara, Webera tetrandra | Rubiaceae | Coromandel Boxwood |
| Canthium diccocum | Canthium didymum, Psydrax dicoccos | Rubiaceae | Ceylon Boxwood |
| Capparis decidua | | Capparaceae | Bare Caper |
| Capparis divaricata | | Capparaceae | Spreading Caper |
| Capparis moonii | | Capparaceae | Large Caper |
| Capparis rheedii | | Capparaceae | Rheed's Caper |
| Capparis rotundifolia | | Capparaceae | Round Leaf Caper |
| Capparis sepiaria | | Capparaceae | Wild Caper Bush |
| Capparis spinosa | Capparis murrayana, Capparis ovata, Capparis rupestris | Capparaceae | Caper Bush |
| Capparis zeylanica | | Capparaceae | Indian Caper |
| Capsella bursa-pastoris | | Brassicaceae | Shepherd's Purse |
| Capsicum annuum | | Solanaceae | Capsicum |
| Capsicum annuum var. annuum | Capsicum annuum var. cerasiforme | Solanaceae | Cherry Pepper |
| Capsicum frutescens cv. Nagahari | | Solanaceae | Tezpur Chilli |
| Capsicum frutescens | | Solanaceae | Chilli |
| Carallia brachiata | Diatoma brachiata, Petalotoma brachiata | Rhizophoracea | Freshwater Mangrove |
| Cardamine flexuosa | Cardamine hirsuta ssp. flexuosa | Brassicaceae | Wood Bitter Cress |
| Cardamine hirsuta | | Brassicaceae | Hairy Bitter Cress |
| Cardiocrinum giganteum | Lilium giganteum | Liliaceae | Giant Himalayan Lily |
| Cardiospermum halicacabum | | Sapindaceae | Balloon Vine |
| Carex baccans | | Cyperaceae | Crimson Seeded Sedge |
| Careya arborea | | Lecythidaceae | Wild Guava |
| Carica papaya | | Caricaceae | Papaya |
| Carissa congesta/carandas | | Apocynaceae | Karanda |
| Carissa macrocarpa | Carissa grandiflora, Arduina macrocarpa, Arduina grandiflora | Apocynaceae | Natal Plum |
| Carissa spinarum | Carissa hirsuta, Carissa diffusa, Carissa opaca | Apocynaceae | Wild Karanda |
| Carmona retusa | Ehretia microphylla | Boraginaceae | Fukien Tea |
| Carthamus oxyacanthus | Carthamus flavescens, Carthamus oxyacantha | Asteraceae | Wild Safflower |
| Carthamus tinctorius | | Asteraceae | Safflower |
| Caryopteris bicolor | Caryopteris wallichiana, Caryopteris odorata | Verbenaceae | Bluebeard |
| Caryota urens | | Arecaceae | Fishtail Palm |
| Casearia graveolens | | Flacourtiaceae | Chilla |
| Casearia tomentosa | | Flacourtiaceae | Toothed Leaf Chilla |
| Cassia bakeriana | | Caesalpiniaceae | Pink Shower Tree |
| Cassia biflora | Cassia biflora var. semperflorens, Senna pallida | Caesalpiniaceae | Twin Flowered Cassia |
| Cassia fistula | | Caesalpiniaceae | Amaltas |
| Cassia grandis | | Caesalpiniaceae | Coral Shower Tree |
| Cassia javanica subsp. renigera | Cassia renigera | Caesalpiniaceae | Burmese Pink Cassia |
| Cassia javanica | | Caesalpiniaceae | Java Cassia |
| Cassia occidentalis | Senna occidentalis | Caesalpiniaceae | Coffee Senna |
| Cassia roxburghii | | Caesalpiniaceae | Red Cassia |
| Cassia x nealiae | Cassia javanica x fistula | Caesalpiniaceae | Rainbow Shower Tree |
| Cassia x nealiae | Cassia javanica x fistula | Caesalpiniaceae | White Rainbow Shower Tree |
| Cassiope fastigiata | Andromeda fastigiata | Ericaceae | Himalayan Heather |
| Cassytha filiformis | | Lauraceae | Love Vine |
| Castanea sativa | | Fagaceae | Sweet Chestnut |
| Castanospermum australe | | Fabaceae | Australian Chestnut |
| Casuarina equisetifolia | | Casuarinaceae | Whistling Pine |
| Catharanthus pusillus | Lochnera pusilla, Vinca pusilla | Apocynaceae | Tiny Periwinkle |
| Catharanthus roseus | Vinca rosea | Apocynaceae | Periwinkle |
| Cattleya labiata | | Orchidaceae | Cattleya Orchid |
| Catunaregam spinosa | | Rubiaceae | Mountain Pomegranate |
| Cayratia trifolia | Cissus trifolia, Vitis trifolia, Vitis carnosa | Vitaceae | Bush Grape |
| Cedrus deodara | | Pinaceae | Devdar |
| Ceiba insignis | Chorisia insignis | Bombacaceae | White Floss Silk Tree |
| Ceiba pentandra | | Bombacaceae | Kapok Tree |
| Ceiba speciosa | Chorisia speciosa | Bombacaceae | Floss Silk Tree |
| Celastrus paniculatus | Celastrus dependens | Celastraceae | Black Oil Plant |
| Celosia argentea var. cristata | | Amaranthaceae | Cockscomb Crested |
| Celosia argentea var. plumosa | | Amaranthaceae | Cockscomb Plumed |
| Celosia argentea var. spicata | Celosia spicata | Amaranthaceae | Silver Cockscomb |
| Celtis tetrandra | Celtis serotina, Celtis trinervia | Ulmaceae | Eastern Nettle Tree |
| Centaurea cyanus | | Asteraceae | Cornflower |
| Centaurea macrocephala | | Asteraceae | Bighead Knapweed |
| Centaurium meyeri | Erythraea meyeri, Erythraea roxburghii, Centaurium centaurioides | Gentianaceae | Pink Centaury |
| Centella asiatica | | Apiaceae | Indian Pennywort |
| Centranthera indica | | Scrophulariaceae | Undir Kani |
| Centratherum punctatum | Centratherum muticum | Asteraceae | Brazilian Button Flower |
| Centrosema pubescens | Centrosema molle, Bradburya pubescens | Fabaceae | Spurred Butterfly Pea |
| Cephalanthera longifolia | Serapias helleborine var. longifolia | Orchidaceae | Sword Leaved Helleborine |
| Cerastium glomeratum | Cerastium viscosum, Cerastium vulgatum var. glomeratum | Caryophyllaceae | Sticky Chickweed |
| Cerbera manghas | Cerbera venenifera, Tanghinia venenifera | Apocynaceae | Sea Mango |
| Cereus hildmannianus | Cereus peruvianus, Cactus peruvianus | Cactaceae | Hedge Cactus |
| Ceriops tagal | | Rhizophoracea | Tagal Mangrove |
| Ceropegia attenuata | | Asclepiadaceae | Tender Ceropegia |
| Ceropegia hirsuta | Ceropegia hispida, Ceropegia jacquemontiana, Ceropegia ophiocephala | Asclepiadaceae | Hairy Ceropegia |
| Ceropegia jainii | Ceropegia prainii | Asclepiadaceae | Jaini Ceropegia |
| Ceropegia juncea | | Asclepiadaceae | Leafless Goglet Flower |
| Ceropegia lawii | Ceropegia maccannii | Asclepiadaceae | Law's Ceropegia |
| Ceropegia rolleii | | Asclepiadaceae | Rolle's Ceropegia |
| Ceropegia sahyadrica | | Asclepiadaceae | Sahyadri Ceropegia |
| Cestrum aurantiacum | | Solanaceae | Orange Cestrum |
| Cestrum diurnum | | Solanaceae | Day Jasmine |
| Cestrum elegans | Cestrum purpureum, Habrothamnus purpureus, Habrothamnus elegans | Solanaceae | Purple Cestrum |
| Cestrum fasciculatum | | Solanaceae | Red Cestrum |
| Cestrum nocturnum | | Solanaceae | Night Blooming Jasmine |
| Cestrum parqui | | Solanaceae | Green Cestrum |
| Chamaecrista absus | Cassia absus | Caesalpiniaceae | Tropical Sensitive Pea |
| Chamaecrista mimosoides | Cassia mimosoides, Cassia sensitiva | Caesalpiniaceae | Feather-leaved Cassia |
| Chamaecrista nictitans | Cassia lechenaultiana, Cassia aeschinomene, Chamaecrista aeschinomene | Caesalpiniaceae | Partridge Pea |
| Chamaedorea metallica | | Arecaceae | Metal Palm |
| Chamaesyce hypericifolia | Chamaesyce glomerifera, Euphorbia glomerifera, Euphorbia hypericifolia | Euphorbiaceae | Graceful Sandmat |
| Chamaesyce thymifolia | Euphorbia thymifolia, Euphorbia rubicunda | Euphorbiaceae | Gulf Sandmat |
| Chamerion angustifolium subsp. angustifolium | Epilobium angustifolium | Onagraceae | Fireweed |
| Chassalia spp. | | Rubiaceae | Chassalia |
| Chenopodium album | | Chenopodiaceae | Bathua |
| Chenopodium murale | | Chenopodiaceae | Nettle-Leaved Goosefoot |
| Chiloschista lunifera | Sarcochilus luniferus | Orchidaceae | Thailand Orchid |
| Chionanthus mala-elengi | | Oleaceae | Malabar Fringe Tree |
| Chirita urticifolia | Chirita grandiflora | Gesneriaceae | Nettle Leaved Chirita |
| Chloris barbata | | Poaceae | Swollen Finger Grass |
| Chlorophytum bharuchae | | Liliaceae | Phulbaji |
| Chlorophytum borivilianum | | Liliaceae | Safed Musli |
| Chlorophytum breviscapum | | Liliaceae | Short Scaped Spider Plant |
| Chlorophytum comosum | | Liliaceae | Spider Plant |
| Chlorophytum malabaricum | | Liliaceae | Malabar Chlorophytum |
| Chlorophytum tuberosum | | Liliaceae | Edible Chlorophytum |
| Chloroxylon swietenia | Swietenia chloroxylon | Rutaceae | Ceylon Satinwood |
| Chonemorpha fragrans | | Apocynaceae | Frangipani Vine |
| Christisonia calcarata | | Orobanchaceae | Spurred Christisonia |
| Christisonia tubulosa | | Orobanchaceae | Magenta Ghost Flower |
| Chromolaena odorata | Eupatorium odoratum | Asteraceae | Siam Weed |
| Chrozophora rottleri | Croton rottleri | Euphorbiaceae | Suryavarti |
| Chrysanthemum coronarium | | Asteraceae | Crown Daisy |
| Chrysanthemum frutescens | | Asteraceae | Marguerite Daisy |
| Chrysanthemum indicum | | Asteraceae | Chrysanthemum |
| Chrysanthemum morifolium 'Illusion' | Dendranthema X grandiflorum | Asteraceae | Quilled Daisy Mum |
| Chrysanthemum morifolium | Dendranthema X grandiflorum | Asteraceae | Garden Mum |
| Chrysanthemum morifolium | Dendranthema X grandiflorum | Asteraceae | Spider Mum |
| Chrysanthemum morifolium | Dendranthema X grandiflorum | Asteraceae | Spoon Mum |
| Chrysophyllum cainito | | Sapotaceae | Star Apple |
| Chrysothemis pulchella | | Gesneriaceae | Sunset Bells |
| Chukrasia tabularis | | Meliaceae | Chikrasi |
| Cicer arietinum | | Fabaceae | Chickpea |
| Cicerbita macrantha | | Asteraceae | Large Violet Dandelion |
| Cicerbita macrorhiza | | Asteraceae | Violet Dandelion |
| Cichorium intybus | | Asteraceae | Chicory |
| Cicuta virosa | | Apiaceae | Cowbane |
| Cinnamomum tamala | Cinnamomum tejpata, Laurus tamala | Lauraceae | Indian Bay Leaf |
| Cinnamomum verum | Cinnamomum zeylanicum | Lauraceae | Cinnamon |
| Cipadessa baccifera | Melia baccifera, Cipadessa fruticosa | Meliaceae | Ranabili |
| Cirsium arvense | Carduus arvensis, Serratula setosa, Cirsium setosum | Asteraceae | Creeping Thistle |
| Cirsium eriophoroides | | Asteraceae | Wool Bearing Thistle |
| Cirsium falconeri | | Asteraceae | Falconer's Thistle |
| Cirsium verutum | Cirsium argyracanthum, Cirsium involucratum, Cnicus argyracanthus | Asteraceae | Common Thistle |
| Cissampelos pareira | Abuta grandifolia | Menispermaceae | Velvet Leaf |
| Cissus javana | Cissus discolor, Vitis discolor | Vitaceae | Climbing Begonia |
| Cissus repanda | Vitis repanda, Vitis pallida | Vitaceae | Pani Bel |
| Cissus woodrowii | | Vitaceae | Woodrow's Grape Tree |
| Cistanche tubulosa | | Orobanchaceae | Desert Hyacinth |
| Citharexylum spinosum | Citharexylum fruticosum | Verbenaceae | Fiddlewood |
| Citrullus colocynthis | Cucumis colocynthis, Colocynthis vulgaris | Cucurbitaceae | Bitter Apple |
| Citrullus lanatus | Citrullus vulgaris | Cucurbitaceae | Watermelon |
| Citrus aurantifolia | | Rutaceae | Lime |
| Citrus limon | | Rutaceae | Lemon |
| Citrus maxima | Citrus grandis | Rutaceae | Pomelo |
| Citrus medica | | Rutaceae | Citron |
| Citrus sinensis | | Rutaceae | Sweet Orange |
| Clarkia amoena | | Onagraceae | Farewell to Spring |
| Clarkia elegans | | Onagraceae | Clarkia |
| Cleistanthus collinus | Lebedieropsis orbicularis | Euphorbiaceae | Garari |
| Cleistocactus strausii | | Cactaceae | Silver Torch Cactus |
| Clematis barbellata | Clematis barbellata var. obtusa | Ranunculaceae | Brown Clematis |
| Clematis connata | | Ranunculaceae | Himalayan Clematis |
| Clematis flammula | | Ranunculaceae | Fragrant Virgin's Bower |
| Clematis gouriana | | Ranunculaceae | Gourian Clematis |
| Clematis heynei | Clematis triloba | Ranunculaceae | Deccan Clematis |
| Clematis montana | | Ranunculaceae | Anemone Clematis |
| Clematis recta | | Ranunculaceae | Erect Clematis |
| Clematis wightiana | Clematis brachiata | Ranunculaceae | Travelers Joy |
| Cleome chelidonii | | Capparaceae | Celandine Spider Flower |
| Cleome gynandra | Cleome pentaphylla, Gynandropsis gynandra, Gynandropsis pentaphylla | Capparaceae | Wild Spider Flower |
| Cleome hasslerana | | Capparaceae | Spider Flower |
| Cleome rutidosperma | Cleome ciliata | Capparaceae | Fringed Spider Flower |
| Cleome simplicifolia | Polanisia simplicifolia | Capparaceae | Simple Leaved Clammyweed |
| Cleome speciosa | Cleome speciosissima, Gynandropsis speciosa | Capparaceae | Showy Spider Flower |
| Cleome viscosa | Polanisia viscosa | Capparaceae | Asian Spider Flower |
| Clerodendrum chinense | Clerodendrum fragrans/philippinum | Verbenaceae | Chinese Glory Bower |
| Clerodendrum incisum | Rotheca incisa, Clerodendrum macrosiphon, Clerodendrum dalei | Verbenaceae | Musical Note |
| Clerodendrum indicum | Clerodendrum siphonanthus | Verbenaceae | Tubeflower |
| Clerodendrum inerme | Volkameria inermis | Verbenaceae | Glory Bower |
| Clerodendrum paniculatum | Clerodendrum diversifolium, Volkameria diversifolia | Verbenaceae | Pagoda Flower |
| Clerodendrum phlomidis | | Verbenaceae | Arni |
| Clerodendrum serratum | | Verbenaceae | Blue Fountain Bush |
| Clerodendrum speciosum | | Verbenaceae | Red Bleeding Heart |
| Clerodendrum splendens | | Verbenaceae | Flaming Glorybower |
| Clerodendrum thomsoniae | | Verbenaceae | Bleeding Heart Vine |
| Clerodendrum trichotomum | Siphonanthus trichotomum, Clerodendron trichotomum | Verbenaceae | Harlequin Glory Bower |
| Clerodendrum viscosum | Clerodendrum infortunatum, Volkameria infortunata | Verbenaceae | Hill Glory Bower |
| Clerodendrum wallichii | Clerodendrum nutans | Verbenaceae | Bridal Veil |
| Clinopodium umbrosum | Calamintha umbrosa, Clinopodium repens, Melissa umbrosum, Satureja umbrosa | Lamiaceae | Shady Calamint |
| Clitoria annua | Clitoria biflora | Fabaceae | Bombay Bean |
| Clitoria ternatea | | Fabaceae | Butterfly Pea |
| Clivia miniata | Imantophyllum miniatum | Amaryllidaceae | Bush Lily |
| Clusia rosea | | Clusiaceae | Autograph Tree |
| Cnicus wallichii | Cirsium nepalense, Cirsium wallichii | Asteraceae | Wallich's Thistle |
| Coccinia grandis | Coccinia indica | Cucurbitaceae | Ivy Gourd |
| Coccoloba uvifera | | Polygonaceae | Sea Grape |
| Cocculus hirsutus | Cocculus villosus | Menispermaceae | Broom Creeper |
| Cochlospermum religiosum | Bombax gossypium, Cochlospermum gossypium, Maximilianea gossypium | Bixaceae | Buttercup Tree |
| Cocos nucifera | | Arecaceae | Coconut |
| Codiaeum variegatum | | Euphorbiaceae | Croton |
| Codonopsis viridis | | Campanulaceae | Green Bellflower Vine |
| Coelogyne cristata | | Orchidaceae | Crested Coelogyne |
| Coelogyne fimbriata | Coelogyne ovalis | Orchidaceae | Fringed Coelogyne |
| Coelogyne fuscescens | | Orchidaceae | Ocher Yellow Coelogyne |
| Coelogyne nitida | Coelogyne ochracea, Cymbidium nitidum | Orchidaceae | Shining Coelogyne |
| Coelogyne punctulata | | Orchidaceae | Spotted Coelogyne |
| Coffea arabica | | Rubiaceae | Coffee |
| Coix lacryma-jobi | Coix arundinacea, Coix lachryma | Poaceae | Job's Tears |
| Coldenia procumbens | | Boraginaceae | Creeping Coldenia |
| Colebrookea oppositifolia | | Lamiaceae | Indian Squirrel Tail |
| Coleus blumei | | Lamiaceae | Coleus |
| Colocasia esculenta | | Araceae | Green Taro |
| Colquhounia coccinea | | Lamiaceae | Himalayan Mint Shrub |
| Colvillea racemosa | | Caesalpiniaceae | Colville's Glory |
| Combretum albidum | Combretum ovalifolium | Combretaceae | Piluki |
| Combretum coccineum | | Combretaceae | Flame Vine |
| Combretum latifolium | | Combretaceae | Large Leaved Climbing Bushwillow |
| Combretum nanum | | Combretaceae | Dwarf Bushwillow |
| Combretum rotundifolium | Combretum aubletii | Combretaceae | Monkey Brush Vine |
| Commelina benghalensis | | Commelinaceae | Whiskered Commelina |
| Commelina clavata | Commelina salicifolia, Commelina thwaitesii, Commelina diffusa | Commelinaceae | Willow Leaved Dayflower |
| Commelina forsskalii | | Commelinaceae | Kanpet |
| Commelina maculata | Commelina obliqua var. viscida, Commelina paludosa var. viscida | Commelinaceae | Spotted Dayflower |
| Commelina paludosa | Commelina obliqua | Commelinaceae | Swamp Dayflower |
| Commelina suffruticosa | Spathodithyros suffruticosus, Commelina rugulosa, Commelina simsonii | Commelinaceae | Shrubby Dayflower |
| Commelina undulata | Commelina striata, Commelina longifolia, Commelina kurzii | Commelinaceae | Long Leaved Dayflower |
| Commicarpus chinensis | Boerhavia chinensis, Boerhavia repanda, Valeriana chinensis | Nyctaginaceae | Diffuse Hogweed |
| Commiphora stocksiana | Balsamea stocksiana, Balsamodendron pubescens | Burseraceae | Mitha Guggal |
| Connarus monocarpus | | Connaraceae | Indian Zebrawood |
| Consolida ajacis | | Ranunculaceae | Larkspur |
| Convolvulus arvensis | | Convolvulaceae | Field Bindweed |
| Convolvulus prostratus | Convolvulus pluricaulis, Convolvulus microphyllus | Convolvulaceae | Shankh Pushpi |
| Conyza stricta | | Asteraceae | Erect Horseweed |
| Copiapoa esmeraldana | Copiapoa humilis | Cactaceae | Esmeralda Copiapoa |
| Copiapoa montana | | Cactaceae | Mountain Copiapoa |
| Corchorus aestuans | Corchorus acutangulus | Tiliaceae | East Indian Mallow |
| Corchorus olitorius | | Tiliaceae | Nalta Jute |
| Cordia boissieri | | Boraginaceae | Texas Olive |
| Cordia dichotoma | | Boraginaceae | Indian Cherry |
| Cordia lutea | | Boraginaceae | Yellow Cordia |
| Cordia sebestena | | Boraginaceae | Scarlet Cordia |
| Cordia subcordata | | Boraginaceae | Beach Cordia |
| Cordyline fruticosa | Cordyline terminalis | Agavaceae | Ti Plant |
| Coreopsis auriculata | | Asteraceae | Mouse Ear Coreopsis |
| Coreopsis tinctoria | | Asteraceae | Golden Coreopsis |
| Coreopsis verticillata 'Moonbeam' | | Asteraceae | Coreopsis Moonbeam |
| Coriandrum sativum | | Apiaceae | Coriander |
| Coriaria nepalensis | | Coriariaceae | Tanner's Tree |
| Cornus capitata | Benthamidia capitata, Benthamia capitata, Cynoxylon capitatum | Cornaceae | Himalayan Strawberry Tree |
| Cornus macrophylla | Cornus brachypoda, Swida macrophylla | Cornaceae | Large Leaf Dogwood |
| Coronopus didymus | | Brassicaceae | Bitter Cress |
| Cortusa brotheri | Cortusa himalaica | Primulaceae | Himalayan Bell Primrose |
| Corydalis cashmeriana | | Fumariaceae | Kashmir Corydalis |
| Corydalis govaniana | | Fumariaceae | Govan's Corydalis |
| Corydalis juncea | | Fumariaceae | Himalayan Corydalis |
| Corydalis thyrsiflora | Corydalis gortschakovii | Fumariaceae | Broad Spur Corydalis |
| Corylus jacquemontii | Corylus colurna var. lacera | Betulaceae | Jacquemont's Hazel |
| Corypha umbraculifera | | Arecaceae | Talipot Palm |
| Cosmos atrosanguineus | | Asteraceae | Chocolate Cosmos |
| Cosmos bipinnatus 'Pied Piper Red' | | Asteraceae | Cosmos Pied Piper Red |
| Cosmos bipinnatus | | Asteraceae | Cosmos pink |
| Cosmos bipinnatus | | Asteraceae | Cosmos white |
| Cosmos caudatus | | Asteraceae | Wild Cosmos |
| Cosmos sulphureus | | Asteraceae | Cosmos orange |
| Cosmostigma racemosum | Asclepias racemosa | Asclepiadaceae | Green Milkweed Creeper |
| Costus pictus | Costus hieroglyphica, Costus mexicanus, Costus congestus | Costaceae | Painted Spiral Ginger |
| Costus speciosus | | Costaceae | Crepe Ginger |
| Costus woodsonii | | Zingiberaceae | Red Button Ginger |
| Cotinus coggygria | | Anacardiaceae | Smoke Tree |
| Cotoneaster integrifolius | Cotoneaster thymifolius | Rosaceae | Entire-leaved Cotoneaster |
| Cotoneaster microphyllus | | Rosaceae | Rockspray Cotoneaster |
| Couroupita guianensis | | Lecythidaceae | Cannon Ball Tree |
| Crassocephalum crepidioides | Gynura crepidioides | Asteraceae | Thickhead |
| Crassula ovata | Crassula portulacea, Crassula argentea, Cotyledon ovata | Crassulaceae | Jade Plant |
| Crataeva adansonii subsp. odora | | Capparaceae | Garlic Pear Tree |
| Crawfurdia angustata | Crawfurdia trailliana, Gentiana helenii | Gentianaceae | Pink Gentian Vine |
| Crawfurdia speciosa | Gentiana speciosa | Gentianaceae | Showy Gentian Vine |
| Cremanthodium ellisii | Cremanthodium plantagineum, Cremanthodium oblongatum | Asteraceae | Himalayan Mini Sunflower |
| Cremanthodium thomsonii | | Asteraceae | Thomson's Cremanthodium |
| Crescentia cujete | | Bignoniaceae | Calabash Tree |
| Cressa cretica | | Convolvulaceae | Rudravanti |
| Crinum amabile | | Amaryllidaceae | Giant Spider Lily |
| Crinum asiaticum | | Amaryllidaceae | Grand Crinum Lily |
| Crinum latifolium | Crinum zeylanicum | Amaryllidaceae | Milk and Wine Lily |
| Crinum powellii 'Album' | | Amaryllidaceae | Cape Coast Lily |
| Crinum powellii | | Amaryllidaceae | Cape Lily |
| Crinum viviparum | Amaryllis vivipara, Crinum ensifolium | Amaryllidaceae | River Crinum Lily |
| Crinum woodrowii | | Amaryllidaceae | Woodrow's Crinum Lily |
| Crocosmia crocosmiiflora | | Iridaceae | Montbretia |
| Crocus sativus | | Iridaceae | Saffron Crocus |
| Crossandra infundibuliformis | | Acanthaceae | Crossandra |
| Crotalaria calycina | | Fabaceae | Hairy Rattlepod |
| Crotalaria filipes | | Fabaceae | Creeping Hemp |
| Crotalaria fysonii | | Fabaceae | Fyson's Rattlepod |
| Crotalaria hebecarpa | Goniogyna hebecarpa, Goniogyna hirta, Hallia hirta | Fabaceae | Fuzzy Fruited Rattlepod |
| Crotalaria juncea | | Fabaceae | Sunn Hemp |
| Crotalaria leptostachya | | Fabaceae | Slender Spiked Rattlepod |
| Crotalaria mysorensis | | Fabaceae | Mysore Rattlepod |
| Crotalaria pallida | Crotalaria mucronata, Crotalaria striata | Fabaceae | Smooth Rattlepod |
| Crotalaria quinquefolia | | Fabaceae | Five Leaf Rattlepod |
| Crotalaria retusa | | Fabaceae | Rattleweed |
| Crotalaria spectabilis | Crotalaria sericea, Crotalaria leschenenaulti | Fabaceae | Showy Rattlepod |
| Crotalaria verrucosa | | Fabaceae | Blue Rattlepod |
| Croton bonplandianum | | Euphorbiaceae | Ban Tulsi |
| Cryptolepis buchananii | Trachelospermum cavaleriei | Asclepiadaceae | Wax Leaved Climber |
| Cryptostegia grandiflora | | Asclepiadaceae | Rubber Vine |
| Cucumis maderaspatanus | Mukia maderaspatana | Cucurbitaceae | Madras Pea Pumpkin |
| Cucumis melo ssp. agrestis | Cucumis melo var. agrestis | Cucurbitaceae | Wild Melon |
| Cucumis melo | Cucumis pubescens, Cucumis trigonus, Cucumis callosus | Cucurbitaceae | Melon |
| Cucumis sativus | | Cucurbitaceae | Cucumber |
| Cucurbita pepo | Cucumis pepo | Cucurbitaceae | Pumpkin |
| Cullen corylifolium | Psoralea corylifolia, Cullen corylifolia | Fabaceae | Scurfy Pea |
| Cuphea hyssopifolia | | Lythraceae | Mexican Heather |
| Cuphea ignea | | Lythraceae | Cigar Plant |
| Cuphea micropetala | | Lythraceae | Tall Cigar Plant |
| Cuphea viscosissima | Cuphea petiolata | Lythraceae | Blue Waxweed |
| Cupressus sempervirens | | Cupressaceae | Italian Cypress |
| Cupressus torulosa | Cupressus tongmaiensis | Cupressaceae | Himalayan Cypress |
| Curculigo orchioides | Curculigo ensifolia, Curculigo brevifolia, Hypoxis orchioides | Hypoxidaceae | Golden Eye Grass |
| Curcuma angustifolia | | Zingiberaceae | East Indian Arrowroot |
| Curcuma aromatica | | Zingiberaceae | Wild Turmeric |
| Curcuma caesia | | Zingiberaceae | Black Turmeric |
| Curcuma cf. mutabilis | | Zingiberaceae | Changeable Turmeric |
| Curcuma inodora | | Zingiberaceae | Scentless Turmeric |
| Curcuma karnatakensis | | Zingiberaceae | Carnatic Curcuma |
| Curcuma longa | | Zingiberaceae | Turmeric |
| Curcuma pseudomontana | | Zingiberaceae | Hill Turmeric |
| Cuscuta chinensis var. chinensis | Cuscuta sulcata | Convolvulaceae | Chinese Dodder |
| Cuscuta europaea var. indica | | Convolvulaceae | Greater Dodder |
| Cuscuta reflexa | | Convolvulaceae | Amar Bel |
| Cyananthus incanus | | Campanulaceae | Low-growing Trailing Bellflower |
| Cyananthus lobatus | | Campanulaceae | Trailing Bellflower |
| Cyananthus microphyllus | | Campanulaceae | Small-leaved Trailing Bellflower |
| Cyanotis arachnoidea | Cyanotis bodinieri | Commelinaceae | Grass of the Dew |
| Cyanotis cristata | | Commelinaceae | Nabhali |
| Cyanotis fasciculata | | Commelinaceae | Nilwanti |
| Cyanotis somaliensis | | Commelinaceae | Pussy Ears |
| Cyanotis tuberosa | | Commelinaceae | Greater Cat Ears |
| Cyanthillium cinereum | Vernonia cinerea, Conyza cinerea, Senecioides cinerea | Asteraceae | Little Ironweed |
| Cyathocline lutea | | Asteraceae | Peela Gangotra |
| Cyathocline purpurea | Tanacelum purpureum, Cyathochine lyrata | Asteraceae | Gangotra |
| Cycas revoluta | | Cycadaceae | Sago Palm |
| Cycas rumphii | | Cycadaceae | Ceylon Sago Palm |
| Cyclamen persicum var. persicum forma roseum | | Primulaceae | Florist Cyclamen pink |
| Cyclamen persicum var. persicum | | Primulaceae | Florist Cyclamen white |
| Cydista aequinoctialis | Mansoa alliacea, Bignonia aequinoctialis, Adenocalymma alliaceum | Bignoniaceae | Garlic Vine |
| Cymbalaria muralis | | Scrophulariaceae | Kenilworth Ivy |
| Cymbidium 'Alison Shaw' | | Orchidaceae | Cymbidium Alison Shaw |
| Cymbidium aloifolium | Cymbidium intermedium, Cymbidium erectum, Epidendrum pendulam | Orchidaceae | Aloe Leaf Cymbidium |
| Cymbidium Balkis X Cymbidium Cariga | | Orchidaceae | Cymbidium Valya Craig |
| Cymbidium bicolor | | Orchidaceae | Two-Colored Cymbidium |
| Cymbidium eburneum | | Orchidaceae | Ivory Cymbidium |
| Cymbidium lowianum | Cymbidium giganteum var. lowianum, Cyperorchis lowiana | Orchidaceae | Low's Cymbidium |
| Cymbidium macrorhizon | Aphyllorchis aberrans, Cymbidium nipponicum | Orchidaceae | Large Root Cymbidium |
| Cymbidium spp. | | Orchidaceae | Cymbidium hybrid |
| Cymbidium tracyanum | | Orchidaceae | Tracy's Cymbidium |
| Cymbopogon citratus | | Poaceae | Lemon Grass |
| Cynara cardunculus | | Asteraceae | Cardoon |
| Cynarospermum asperrimum | Blepharis asperrima | Acanthaceae | Hill Blepharis |
| Cynodon dactylon | | Poaceae | Bermuda Grass |
| Cynoglossum amabile | | Boraginaceae | Chinese Forget-Me-Not |
| Cynoglossum zeylanicum | | Boraginaceae | Ceylon Forget Me Not |
| Cyperus alternifolius | | Cyperaceae | Umbrella Palm |
| Cyperus compressus | | Cyperaceae | Poorland Flat Sedge |
| Cyperus eragrostis | | Cyperaceae | Tall Flat Sedge |
| Cyperus niveus | | Cyperaceae | Snow White Sedge |
| Cyperus rotundus | | Cyperaceae | Common Nut Sedge |
| Cyperus scariosus | | Cyperaceae | Umbrella Sedge |
| Cyphostemma auriculatum | Cissus auriculata, Vitis auriculata | Vitaceae | Eared Cyphostemma |
| Cypripedium cordigerum | | Orchidaceae | Heart-shaped Slipper Orchid |
| Cypripedium elegans | Coelogyne elegans | Orchidaceae | Elegant Slipper Orchid |
| Cypripedium himalaicum | Cypripedium macranthon var. himalaicum | Orchidaceae | Himalayan Slipper Orchid |
| Cyrtanthus mackenii | | Amaryllidaceae | Ifafa Lily |
| Cyrtostachys renda | Cyrtostachys lakka | Arecaceae | Sealing Wax Palm |
| Dactyloctenium aegyptium | Eleusine aegyptiaca | Poaceae | Crowfoot Grass |
| Dactylorhiza hatagirea | Orchis latifolia var. indica | Orchidaceae | Himalayan Marsh Orchid |
| Dahlia coccinea | | Asteraceae | Single Flowered Dahlia |
| Dahlia imperialis | | Asteraceae | Tree Dahlia |
| Dahlia | | Asteraceae | Decorative Dahlia |
| Dahlia | | Asteraceae | Waterlily Dahlia |
| Dalbergia horrida | Amerimnon horridum, Dalbergia sympathetica | Fabaceae | Prickly Dalbergia |
| Dalbergia lanceolaria ssp. lanceolaria | | Fabaceae | Takoli |
| Dalbergia latifolia | Amerimnon latifolium | Fabaceae | Black Rosewood |
| Dalbergia sissoo | | Fabaceae | Shisham |
| Daphne bholua var. glacialis | | Thymelaeaceae | Icy Himalayan Daphne |
| Daphne papyracea | Daphne cannabina, Daphne odora | Thymelaeaceae | Indian Paper Plant |
| Dasiphora fruticosa | Potentilla fruticosa | Rosaceae | Shrubby Cinquefoil |
| Datura ferox | | Solanaceae | Fierce Thorn Apple |
| Datura innoxia | | Solanaceae | Datura |
| Datura metel 'Blackcurrant Swirl' | | Solanaceae | Datura Blackcurrant Swirl |
| Datura metel 'Flore Pleno' | | Solanaceae | Datura Double Purple |
| Datura metel | | Solanaceae | Datura Triple Yellow |
| Datura stramonium | | Solanaceae | Jimsonweed |
| Datura wrightii | Datura meteloides | Solanaceae | Sacred Datura |
| Daucus carota var. sativus | | Apiaceae | Carrot |
| Decaschistia crotonifolia | | Malvaceae | Croton Leaf Mysore Mallow |
| Decaschistia trilobata | | Malvaceae | Lobed Leaved Mysore Mallow |
| Delonix elata | Poinciana elata | Caesalpiniaceae | White Gulmohar |
| Delonix regia | | Caesalpiniaceae | Gulmohar |
| Delphinium brunonianum | Delphinium jacquemontianum | Ranunculaceae | Musk Larkspur |
| Delphinium dasycaulon | Delphinium malabaricum | Ranunculaceae | Malabar Delphinium |
| Dendranthema X grandiflorum | | Asteraceae | Chrysanthemum pink |
| Dendranthema X grandiflorum | | Asteraceae | Chrysanthemum yellow |
| Dendranthema X grandiflorum | | Asteraceae | White Chrysanthemum |
| Dendrobium aphyllum | Limodorum aphyllum, Dendrobium macrostachyum | Orchidaceae | Leafless Dendrobium |
| Dendrobium barbatulum | | Orchidaceae | Small Bearded Dendrobium |
| Dendrobium bicameratum | Callista bicamerata, Dendrobium breviflorum | Orchidaceae | Short Flower Dendrobium |
| Dendrobium chrysanthum | | Orchidaceae | Golden Flowered Dendrobium |
| Dendrobium chrysotoxum | Dendrobium suavissimum | Orchidaceae | Golden Arch Dendrobium |
| Dendrobium cucullatum | Dendrobium pierardii, Dendrobium aphyllum var cucullatum | Orchidaceae | Hooded Dendrobium |
| Dendrobium densiflorum | Callista densiflora, Callista clavata, Dendrobium clavatum | Orchidaceae | Pineapple Orchid |
| Dendrobium fimbriatum | | Orchidaceae | Fringe Lipped Dendrobium |
| Dendrobium formosum | | Orchidaceae | Handsome Flowered Dendrobium |
| Dendrobium herbaceum | | Orchidaceae | Grassy Dendrobium |
| Dendrobium infundibulum | | Orchidaceae | Funnel Lip Dendrobium |
| Dendrobium jenkinsii | | Orchidaceae | Jenkins's Dendrobium |
| Dendrobium kingianum | Callista kingiana, Dendrocoryne kingianum | Orchidaceae | Pink Rock Orchid |
| Dendrobium microbulbon | | Orchidaceae | Tiny Dendrobium |
| Dendrobium nobile | | Orchidaceae | Noble Dendrobium |
| Dendrobium ovatum | Dendrobium chlorops, Epidendrum ovatum | Orchidaceae | Green Lipped Dendrobium |
| Dendrobium peguanum | Callista pygmaea, Dendrobium fesselianum, Dendrobium pygmaeum | Orchidaceae | Pegu Dendrobium |
| Dendrobium primulinum | Callista primulina, Dendrobium nobile var pallidiflorum | Orchidaceae | Primrose Dendrobium |
| Dendrobium transparens | | Orchidaceae | Translucent Dendrobium |
| Dendrobium williamsonii | Callista lubbersiana, Callista williamsonii | Orchidaceae | Williamson's Dendrobium |
| Dendrocalamus strictus | Bambusa stricta, Bambos stricta | Poaceae | Calcutta Bamboo |
| Dendrolobium umbellatum | Desmodium umbellatum, Hedysarum umbellatum | Fabaceae | Horse Bush |
| Dendrophthoe curvata | | Loranthaceae | Rainforest Mistletoe |
| Dendrophthoe falcata var. coccinea | | Loranthaceae | Red Honey Suckle Mistletoe |
| Dendrophthoe falcata var. falcata | Loranthus longiflorus var. falcatus, Loranthus falcatus, Loranthus longiflorus | Loranthaceae | Honey Suckle Mistletoe |
| Dentella repens | Oldenlandia repens | Rubiaceae | Creeping Dentella |
| Derris heyneana | Pongamia heyneana, Derris heyneana var. paniculata, Derris bakeri | Fabaceae | Climbing Derris |
| Derris scandens | Dalbergia scandens, Dalbergia timoriensis, Deguelia timoriensis | Fabaceae | Jewel Vine |
| Derris trifoliata | Derris uliginosa, Pongamia uliginosa, Robinia uliginosa | Fabaceae | Common Derris |
| Desmodium dichotomum | Desmodium diffusum | Fabaceae | Chikta |
| Desmodium gangeticum | Hedysarum gangeticum | Fabaceae | Sal Leaved Desmodium |
| Desmodium heterocarpon | Hedysarum heterocarpon | Fabaceae | Asian Tick Trefoil |
| Desmodium laxiflorum | | Fabaceae | Loose Flowered Desmodium |
| Desmodium oojeinense | Dalbergia oojeinensis, Ougeinia oojeinensis, Ougeinia dalbergioides | Fabaceae | Sandan |
| Desmodium triflorum | Meibomia triflora, Desmodium parvifolium, Hedysarum triflorum | Fabaceae | Creeping Tick Trefoil |
| Desmodium velutinum | Hedysarum velutinum, Meibomia lasiocarpa, Desmodium latifolium | Fabaceae | Velvet-Leaf Desmodium |
| Deutzia bhutanensis | | Hydrangeaceae | Bhutan Deutzia |
| Deutzia compacta | | Hydrangeaceae | Compact Deutzia |
| Dianella tasmanica | | Liliaceae | Flax Lily |
| Dianella tasmanica 'Variegata' | | Liliaceae | Flax Lily Variegated |
| Dianthus barbatus | | Caryophyllaceae | Sweet William |
| Dianthus caryophyllus | | Caryophyllaceae | Carnation orange |
| Dianthus caryophyllus | | Caryophyllaceae | Carnation pink |
| Dianthus chinensis | Dianthus amurensis, Dianthus heddewigii, Dianthus laciniatus | Caryophyllaceae | China Pink |
| Diapensia himalaica | Diapensia acutifolia | Diapensiaceae | Himalayan Pincushion Plant |
| Dicentra macrocapnos | Dactylicapnos macrocapnos | Papaveraceae | Yellow Bleeding Heart |
| Dichanthium annulatum | Dichanthium papillosum, Andropogon annulatus | Poaceae | Sheda Grass |
| Dichrostachys cinerea | Cailliea glomerata, Dichrostachys glomerata, Mimosa cinerea | Mimosaceae | Sickle Bush |
| Didymocarpus pedicellatus | Didymocarpus pedicellata | Gesneriaceae | Stone Flower |
| Didymoplexis pallens | Apetalon minutum, Cheirostylis kanarensis | Orchidaceae | Crystal Bells |
| Dieffenbachia amoena | | Araceae | Dumb Cane |
| Dietes grandiflora | | Iridaceae | Wild Iris |
| Digera muricata | Digera arvensis, Achyranthes muricata | Amaranthaceae | False Amaranth |
| Digitalis ferruginea | | Scrophulariaceae | Rusty Foxglove |
| Digitalis purpurea f. albiflora | | Scrophulariaceae | White Flowered Foxglove |
| Digitalis purpurea | | Scrophulariaceae | Foxglove |
| Dillenia indica | | Dilleniaceae | Elephant Apple |
| Dillenia pentagyna | Dillenia floribunda, Dillenia hainanensis | Dilleniaceae | Karmal |
| Dillenia suffruticosa | Wormia suffruticosa | Dilleniaceae | Shrubby Dillenia |
| Dimorphocalyx lawianus | Trigonostemon lawianus | Euphorbiaceae | Jodpakli |
| Dimorphotheca pluvialis | | Asteraceae | African Daisy white |
| Dimorphotheca sinuata | | Asteraceae | African Daisy orange |
| Dimorphotheca sinuata | | Asteraceae | African Daisy yellow |
| Dinetus racemosus | Porana racemosa/ malabarica | Convolvulaceae | Snow Creeper |
| Dioscorea bulbifera | | Dioscoreaceae | Air Yam |
| Dioscorea pentaphylla | Dioscorea triphylla | Dioscoreaceae | Five Leaf Yam |
| Dioscorea villosa | Dioscorea glauca, Dioscorea hirticaulis, Dioscorea quaternata | Dioscoreaceae | Wild Yam |
| Diospyros malabarica | Diospyros peregrina | Ebenaceae | Gaub |
| Diospyros melanoxylon | Diospyros tupru, Diospyros dubia, Diospyros wightiana | Ebenaceae | Coromandel Ebony |
| Diospyros montana f. cordifolia | Diospyros cordifolia | Ebenaceae | Bistendu |
| Dipcadi montanum | | Liliaceae | Dipcadi |
| Diphylax urceolata | Habenaria urceolata | Orchidaceae | Pitcher Diphylax |
| Diploclisia glaucescens | Cocculus glaucescens, Cocculus macrocarpus | Menispermaceae | Glaucous Diploclisia |
| Diplocyclos palmatus | Bryonia palmata, Zehneria erythrocarpa, Bryonopsis laciniosa | Cucurbitaceae | Lollipop Climber |
| Dipteracanthus prostratus | Ruellia prostrata | Acanthaceae | Bell Weed |
| Dissotis rotundifolia | | Melastomataceae | Spanish Shawl |
| Dodonaea viscosa | | Sapindaceae | Hop Bush |
| Dolichandrone falcata | Spathodea falcata | Bignoniaceae | Medhshingi |
| Dombeya pulchra | | Malvaceae | Silver Dombeya |
| Dombeya spectabilis | Assonia spectabilis | Malvaceae | Dombeya |
| Dombeya wallichii | Astrapaea wallichii | Malvaceae | Pink Ball Dombeya |
| Dorotheanthus bellidiformis | Mesembryanthemum criniflorum | Aizoaceae | Ice Plant |
| Dracaena fragrans | Aletris fragrans | Agavaceae | Corn Plant |
| Dregea volubilis | Asclepias volubilis, Dregea formosana, Wattakaka volubilis | Asclepiadaceae | Sneeze Wort |
| Drosera burmannii | Drosera burmanni | Droseraceae | Burmann's Sundew |
| Drosera indica | | Droseraceae | Flycatcher |
| Drosera peltata | | Droseraceae | Shield Sundew |
| Duabanga grandiflora | Duabanga sonneratioides | Lythraceae | Duabanga |
| Dubyaea hispida | | Asteraceae | Bristly Dubyaea |
| Duchesnea indica | Potentilla indica, Fragaria indica | Rosaceae | Indian Strawberry |
| Duranta erecta 'Alba' | | Verbenaceae | White Sky Flower |
| Duranta erecta | Duranta repens | Verbenaceae | Sky Flower |
| Duranta repens/erecta 'Variegata' | | Verbenaceae | Variegated Sky Flower |
| Dypsis lutescens | | Arecaceae | Golden Cane Palm |
| Dyschoriste depressa | | Acanthaceae | Dwarf Snakerherb |
| Ecbolium ligustrinum | Ecbolium viride | Acanthaceae | Green Shrimp Plant |
| Ecbolium linneanum | Justicia ecbolia | Acanthaceae | Blue Fox Tail |
| Echeveria elegans | Oliverella elegans, Echeveria perelegans, Echeveria tinctoria | Crassulaceae | Mexican Snowball |
| Echeveria peacockii | | Crassulaceae | Peacock Echeveria |
| Echinochloa colona | | Poaceae | Jungle Rice |
| Echinochloa crus-galli | Panicum crus-galli | Poaceae | Barnyard Grass |
| Echinodorus palaefolius | Sagittaria palaefolia | Alismataceae | Mexican Sword-Plant |
| Echinops echinatus | | Asteraceae | Indian Globe Thistle |
| Echinopsis spp. | | Cactaceae | Sea Urchin Cactus |
| Eclipta prostrata | Eclipta erecta, Eclipta alba, Eclipta punctata, Verbesina prostrata | Asteraceae | False Daisy |
| Edgeworthia gardneri | Daphne gardneri | Thymelaeaceae | Nepalese Paper Bush |
| Ehretia acuminata | | Boraginaceae | Koda Tree |
| Ehretia laevis | | Boraginaceae | Chamror |
| Eichornia crassipes | | Pontederiaceae | Water Hyacinth |
| Elaeagnus conferta | Elaeagnus latifolia | Elaeagnaceae | Wild Olive |
| Elaeocarpus floribundus | | Elaeocarpaceae | Indian Olive |
| Elaeocarpus grandis | | Elaeocarpaceae | Blue Marble Tree |
| Elaeodendron glaucum | Cassine glauca, Mangifera glauca | Celastraceae | Ceylon Tea |
| Elephantopus scaber | | Asteraceae | Elephant Foot |
| Elettaria cardamomum | | Zingiberaceae | Cardamom |
| Elsholtzia blanda | Aphanochilus blandus, Perilla elata | Lamiaceae | Lomba |
| Elsholtzia fruticosa | | Lamiacaea | Shrubby Mint |
| Elytranthe albida | Loranthus albidus, Elytranthe henryi | Loranthaceae | Pale Bark Mistletoe |
| Elytraria acaulis | | Acanthaceae | Asian Scalystem |
| Embelia basaal | Embelia tsjeriam-cottam | Myrsinaceae | Malabar Embelia |
| Emilia sonchifolia | Emilia javanica | Asteraceae | Purple Sow Thistle |
| Enkianthus deflexus | Enkianthus himalaicus, Rhodora deflexa | Ericaceae | Himalayan Red Bells |
| Ensete superbum | Musa superba | Musaceae | Rock Banana |
| Entada rheedei | Entada rheedii, Entada pursaetha | Mimosaceae | Sea Bean |
| Enterolobium contortisiliquum | Enterolobium glaucescens, Mimosa contortisiliqua | Mimosaceae | Earpod Tree |
| Epidendrum radicans | | Orchidaceae | Red Crucifix Orchid |
| Epilobium coloratum | | Onagraceae | Purpleleaf Willowherb |
| Epilobium latifolium | | Onagraceae | River Beauty |
| Epilobium laxum | | Onagraceae | Lax Willowherb |
| Epilobium wallichianum | | Onagraceae | Wallich's Willow-Herb |
| Epipactis helleborine | Epipactis latifolia, Helleborine macrostachya, Serapias helleborine | Orchidaceae | Broad Leaved Helleborine |
| Epiphyllum hybrid | | Cactaceae | Orchid Cactus pink |
| Epiphyllum oxypetalum | | Cactaceae | Orchid Cactus |
| Episcia cupreata | Achimenes cupreata | Gesneriaceae | Flame Violet |
| Eragrostis cilianensis | Eragrostis cilianensis, Poa cilianesis | Poaceae | Grey Lovegrass |
| Eragrostis unioloides | Poa unioloides, Eragrostis amabilis | Poaceae | Chinese Lovegrass |
| Eranthemum pulchellum | Eranthemum nervosum, Justicia nervosa, Daedalacanthus nervosus | Acanthaceae | Blue Sage |
| Eranthemum roseum | | Acanthaceae | Rosy Eranthemum |
| Eria stricta | Mycaranthes stricta | Orchidaceae | Erect Eria |
| Erigeron annuus | Aster annuus, Erigeron heterophyllus | Asteraceae | Annual Fleabane |
| Erigeron bellidioides | Aster bellidioides | Asteraceae | Daisy Fleabane |
| Erigeron karvinskianus | Erigeron mucronatus | Asteraceae | Mexican Fleabane |
| Erigeron multiradiatus | | Asteraceae | Himalayan Fleabane |
| Erinocarpus nimmonii | Erinocarpus nimmoanus | Tiliaceae | Jangli Bhendi |
| Eriobotrya japonica | | Rosaceae | Loquat |
| Eriocaulon epedunculatum | | Eriocaulaceae | Stalkless Piperwort |
| Eriocaulon heterolepis | | Eriocaulaceae | Buttonhead Pipewort |
| Eriocaulon sedgwickii | | Eriocaulaceae | Spherical Pipewort |
| Eriocaulon sharmae | | Eriocaulaceae | Sharma's Pipewort |
| Eriocaulon stellulatum | | Eriocaulaceae | Starry Pipewort |
| Eriocaulon tuberiferum | | Eriocaulaceae | Tuberous Pipewort |
| Eriolaena quinquelocularis | Microchlaena quinquelocularis | Sterculiaceae | Bothi |
| Eritrichium canum | | Boraginaceae | Scree Plant |
| Eruca sativa | | Brassicaceae | Rocket Salad |
| Eryngium foetidum | | Apiaceae | Long Coriander |
| Erysimum cheiri | Cheiranthus cheiri | Brassicaceae | English Wallflower |
| Erysimum melicentae | | Brassicaceae | Himalayan Wallflower |
| Erythrina blakei | | Fabaceae | Blake's Coral Tree |
| Erythrina crista-galli | | Fabaceae | Cockspur Coral Tree |
| Erythrina mitis | Erythrina umbrosa, Corallodendron umbrosum, Chirocalyx umbrosus | Fabaceae | Shady Coral Tree |
| Erythrina stricta var. suberosa | | Fabaceae | Corky Coral Tree |
| Erythrina variegata | Erythrina indica | Fabaceae | Indian Coral Tree |
| Erythrina x bidwillii | | Fabaceae | Coral Bean Tree |
| Erythroxylum monogynum | Erythroxylon monogynum | Erythroxylaceae | Red Cedar |
| Eschscholzia caespitosa | | Papaveraceae | Dwarf California Poppy |
| Eschscholzia californica | | Papaveraceae | California Poppy |
| Escobaria missouriensis | | Cactaceae | Yellow Pincushion Cactus |
| Escobaria vivipara | | Cactaceae | Pincushion Cactus |
| Etlingera elatior | Alpinia elatior | Zingiberaceae | Torch Ginger |
| Eucalyptus spp. | | Myrtaceae | Eucalyptus |
| Eucharis grandiflora | | Amaryllidaceae | Amazon Lily |
| Eugenia phillyraeoides | Syzygium phillyraeoides, Eugenia mooniana var. gracilis | Myrtaceae | Ceylon Plum |
| Eugenia uniflora | | Myrtaceae | Surinam Cherry |
| Eulophia flava | Cyrtopera flava, Cyrtopodium flavum, Graphorkis flava | Orchidaceae | Yellow Eulophia |
| Eulophia spectabilis | | Orchidaceae | Spectacular Eulophia |
| Euonymus japonicus | | Celastraceae | Japanese Spindle Tree |
| Eupatorium birmanicum | | Asteraceae | Burma Agrimony |
| Euphorbia actinoclada | | Euphorbiaceae | Spreading Branch Spurge |
| Euphorbia antiquorum | | Euphorbiaceae | Triangular Spurge |
| Euphorbia caducifolia | | Euphorbiaceae | Leafless Milk Hedge |
| Euphorbia cotinifolia | | Euphorbiaceae | Caribbean Copper Plant |
| Euphorbia cyathophora | Poinsettia cyathophora | Euphorbiaceae | Painted Leaf Poinsettia |
| Euphorbia decaryi | | Euphorbiaceae | Wrinkled Leaf Spurge |
| Euphorbia dracunculoides | Euphorbia lanceolata, Tithymalus dracunculoides | Euphorbiaceae | Dragon Spurge |
| Euphorbia heterophylla | Euphorbia geniculata, Euphorbia prunifolia, Poinsettia heterophylla | Euphorbiaceae | Wild Poinsettia |
| Euphorbia hirta | | Euphorbiaceae | Asthma Weed |
| Euphorbia laeta | Euphorbia rothiana | Euphorbiaceae | Common Hill Spurge |
| Euphorbia leucocephala | | Euphorbiaceae | Snow Bush |
| Euphorbia milii lutea | | Euphorbiaceae | Yellow Crown of Thorns |
| Euphorbia milii splendens | | Euphorbiaceae | Orchid Crown of Thorns |
| Euphorbia milli | | Euphorbiaceae | Crown of Thorns |
| Euphorbia neriifolia | | Euphorbiaceae | Indian Spurge Tree |
| Euphorbia nivulia | Euphorbia neriifolia | Euphorbiaceae | Leafy Milk Hedge |
| Euphorbia notoptera | | Euphorbiaceae | Winged Seed Spurge |
| Euphorbia pulcherrima | | Euphorbiaceae | Poinsettia |
| Euphorbia rosea | Chamaesyce rosea | Euphorbiaceae | Rosy Spurge |
| Euphorbia spp. | | Euphorbiaceae | Crown of Thorns red-green |
| Euphorbia viguieri | | Euphorbiaceae | Viguier's Spurge |
| Euphorbia wallichii | | Euphorbiaceae | Wallich Spurge |
| Euphrasia officinalis | | Scrophulariaceae | Eyebright |
| Euryale ferox | | Nymphaeaceae | Prickly Waterlily |
| Euryops chrysanthemoides | Gamolepis chrysanthemoides | Asteraceae | African Bush Daisy |
| Eustoma grandiflorum | Lisianthus russellianus, Bilamista grandiflora | Gentianaceae | Tulip Gentian |
| Evolvulus alsinoides | Convolvulus alsinoides | Convolvulaceae | Dwarf Morning Glory |
| Evolvulus glomeratus 'Blue Daze' | | Convolvulaceae | Blue Daze |
| Evolvulus nummularius | Convolvulus nummularius, Volvulopsis nummularium | Convolvulaceae | Roundleaf Bindweed |
| Exacum lawii | | Gentianaceae | Law's Persian Violet |
| Exacum pedunculatum | | Gentianaceae | Stalked Persian Violet |
| Exacum pumilum | | Gentianaceae | Little Persian Violet |
| Exacum tetragonum | Exacum tetragonum var. stylosa, Exacum perottetii, Exacum bicolor | Gentianaceae | Bicolor Persian Violet |
| Exacum wightianum | | Gentianaceae | Wight's Persian Violet |
| Fagopyrum dibotrys | | Polygonaceae | Perennial Buckwheat |
| Ficus arnottiana | Urostigma arnottiana | Moraceae | Indian Rock Fig |
| Ficus bengalensis | | Moraceae | Banyan Tree |
| Ficus benghalensis var. krishnae | Ficus krishnae | Moraceae | Krishna Fig |
| Ficus benjamina | | Moraceae | Weeping Fig |
| Ficus carica | | Moraceae | Anjeer |
| Ficus drupacea var. pubescens | Ficus mysorensis, Ficus mysorensis var. pubescens | Moraceae | Mysore Fig |
| Ficus elastic | Ficus cordata, Ficus decora | Moraceae | Rubber Tree |
| Ficus exasperata | Ficus asperrima, Ficus punctifera | Moraceae | Brahma's Banyan |
| Ficus hispida | Ficus oppositifolia, Ficus compressa, Covellia hispida | Moraceae | Hairy Fig |
| Ficus lyrata | Ficus pandurata | Moraceae | Fiddle Leaf Fig |
| Ficus microcarpa | Ficus retusa, Ficus nitida | Moraceae | Laurel Fig |
| Ficus mollis | | Moraceae | Soft Fig |
| Ficus natalensis subsp. leprieurii | Ficus triangularis, Ficus leprieurii | Moraceae | Natal Fig |
| Ficus palmata | Ficus pseudocarica | Moraceae | Punjab Fig |
| Ficus racemosa | Ficus glomerata, Ficus lucescens, Ficus racemosa var. elongata | Moraceae | Goolar |
| Ficus religiosa | | Moraceae | Peepal |
| Ficus semicordata | Covellia cunia, Ficus cunia, Ficus conglomerata | Moraceae | Drooping Fig |
| Ficus tinctoria | Ficus gibbosa, Ficus parasitica, Ficus swinhoei | Moraceae | Dye Fig |
| Ficus virens | Ficus infectoria | Moraceae | White Fig |
| Filicium decipiens | | Sapindaceae | Fern Tree |
| Filipendula vestita | | Rosaceae | Himalayan Meadowsweet |
| Fioria vitifolia | Hibiscus vitifolius, Kosteletzkya vitifolia | Malvaceae | Grape Leaved Mallow |
| Firmiana colorata | Erythropsis colorata, Sterculia colorata | Sterculiaceae | Scarlet Sterculia |
| Firmiana pallens | Erythropsis pallens, Sterculia pallens | Sterculiaceae | Pale Sterculia |
| Flacourtia indica | Flacourtia ramontchi, Flacourtia sepiaria, Gmelina indica | Flacourtiaceae | Governor's Plum |
| Flacourtia jangomas | Stigmarota jangomas, Flacourtia cataphrata | Flacourtiaceae | Coffee Plum |
| Flacourtia montana | | Flacourtiaceae | Mountain Sweet Thorn |
| Flemingia chappar | Moghania chappar | Fabaceae | Galphuli |
| Flemingia gracilis | | Fabaceae | Slender Flemingia |
| Flemingia strobilifera | | Fabaceae | Wild Hops |
| Floscopa scandens | Tradescantia paniculata, Commelina hispida, Aneilema hispida | Commelinaceae | Climbing Flower Cup |
| Flueggea leucopyrus | Securinega leucopyrus, Phyllanthus leucopyrus | Phyllanthaceae | Bushweed |
| Foeniculum vulgare | | Apiaceae | Fennel |
| Forsythia suspensa | Ligustrum suspensum, Syringa suspensa | Oleaceae | Weeping Forsythia |
| Fragaria nubicola | Potentilla nubicola, Fragaria vesca var. nubicola | Rosaceae | Himalayan Strawberry |
| Fragaria vesca/ananassa | | Rosaceae | Strawberry |
| Freesia spp. | | Iridaceae | Freesia |
| Fritillaria roylei | | Liliaceae | Himalayan Fritillary |
| Fuchsia corymbiflora | | Onagraceae | Vine Fuchsia |
| Fuchsia spp. | | Onagraceae | Fuchsia |
| Gagea lutea | Ornithogalum luteum, Gagea indica, Gagea elegans | Liliaceae | Yellow Star of Bethlehem |
| Gaillardia 'Fanfare' | | Asteraceae | Gaillardia Fanfare |
| Gaillardia pulchella | | Asteraceae | Blanket Flower |
| Gaillardia pulchella | | Asteraceae | Gaillardia double |
| Galinsoga parviflora | Tridax parviflora | Asteraceae | Quick Weed |
| Galphimia glauca | | Malpighiaceae | Slender Goldshower |
| Gamochaeta pensylvanica | Gnaphalium pensylvanicum, Gnaphalium peregrinum | Asteraceae | Pennsylvania Cudweed |
| Garcinia indica | Brindonia indica | Clusiaceae | Kokam |
| Garcinia talbotii | Garcinia malabarica, Garcinia ovalifolia var. macrantha | Clusiaceae | Talbot Garcinia |
| Gardenia gummifera | | Rubiaceae | Gummy Gardenia |
| Gardenia jasminoides | Gardenia augusta | Rubiaceae | Gardenia |
| Gardenia latifolia | | Rubiaceae | Indian Boxwood |
| Gardenia resinifera | Gardenia lucida | Rubiaceae | Brilliant Gardenia |
| Garuga pinnata | | Burseraceae | Garuga |
| Gasteria bicolor | | Asphodelaceae | Gasteria |
| Gastrochilus inconspicuus | Saccolabium inconspicuum, Luisia inconspicua, Luisiopsis inconspicua | Orchidaceae | Tiny Gastrochilus |
| Gaultheria trichophylla | | Ericaceae | Himalayan Snowberry |
| Gazania rigens | | Asteraceae | Gazania |
| Geissaspis cristata | Zornia disperma | Fabaceae | Eyelashes Shell Beans |
| Geissaspis cristata var. tenella | Geissaspis tenella | Fabaceae | Tender Eyelashes Shell Beans |
| Gentiana carinata | | Gentianaceae | Dark Blue Gentian |
| Gentiana marginata | | Gentianaceae | Clustered Summer Gentian |
| Gentiana pedicellata | Ericala pedicellata, Gentiana pedicellata var. wallichii | Gentianaceae | Purple Stalked Gentian |
| Gentiana sino-ornata | | Gentianaceae | Chinese Gentian |
| Gentiana spp. | | Gentianaceae | Gentian |
| Gentiana urnula | | Gentianaceae | Urn-shaped Gentian |
| Geodorum densiflorum | | Orchidaceae | Nodding Swamp Orchid |
| Geranium donianum | | Geraniaceae | Don's Geranium |
| Geranium himalayense | | Geraniaceae | Himalayan Geranium |
| Geranium nepalense | Geranium pallidum, Geranium patens, Geranium radicans | Geraniaceae | Nepal Geranium |
| Geranium ocellatum | Geranium bicolor, Geranium choorense, Geranium ocellatum var. himalaicum | Geraniaceae | Black Eyed Geranium |
| Geranium pratense | | Geraniaceae | Meadow Cranesbill |
| Geranium procurrens | | Geraniaceae | Trailing Geranium |
| Geranium wallichianum 'Buxton Blue' | | Geraniaceae | Geranium Buxton Blue |
| Geranium wallichianum | | Geraniaceae | Wallich Geranium |
| Gerascanthus gharaf | Cordia gharaf | Boraginaceae | Gondni |
| Gerbera gossypina | | Asteraceae | Hairy Gerbera Daisy |
| Gerbera Jamesonii | | Asteraceae | Gerbera Daisy |
| Ginkgo biloba | | Ginkgoaceae | Ginkgo |
| Girardinia diversifolia | Girardiana platyphylla, Girardinia heterophylla , Urtica heterophylla | Urticaceae | Bichchhoo |
| Gladiolus dalenii/natalensis | | Iridaceae | Gladiolus |
| Glandularia pulchella | Verbena pulchella | Verbenaceae | Moss Verbena |
| Gleditsia triacanthos | | Caesalpiniaceae | Honey Locust |
| Glinus oppositifolius | Mollugo oppositifolia, Mollugo spergula | Molluginaceae | Jima |
| Gliricidia sepium | Gliricidia maculata | Fabaceae | Mexican Lilac |
| Glochidion ellipticum | | Euphorbiaceae | Bhoma |
| Gloriosa superba | Gloriosa rothschildiana, Gloriosa speciosa, Gloriosa simplex | Liliaceae | Glory Lily |
| Glossocardia bosvallia | Verbesina bosvallia | Asteraceae | Patthar Suva |
| Glycosmis mauritiana | Limonia mauritiana, Glycosmis pentaphylla, Limonia pentaphylla | Rutaceae | Orangeberry |
| Gmelina arborea | | Verbenaceae | Gamhar |
| Gmelina asiatica | Gmelina parvifolia | Verbenaceae | Asian Bushbeech |
| Gmelina philippensis | Gmelina hystrix | Verbenaceae | Parrot's Beak |
| Gnaphalium affine | | Asteraceae | Cotton Weed |
| Gnetum scandens | | Gnetaceae | Joint Fir |
| Gnidia glauca | | Thymelaeaceae | Fish Poison Bush |
| Gomphrena globosa | | Amaranthaceae | Gomphrena |
| Gomphrena serrata | Gomphrena celosioides/ decumbens | Amaranthaceae | Prostrate Gomphrena |
| Gonatanthus pumilus | Caladium pumilum, Gonatanthus sarmentosus | Araceae | Dwarf Gonatanthus |
| Goodyera hemsleyana | Epipactis hemsleyana | Orchidaceae | Hemsley Jewel Orchid |
| Goodyera procera | Epipactis procera, Leucostachys procera | Orchidaceae | Slim Goodyera |
| Goodyera repens | Satyrium repens, Epipactis repens, Orchis repens | Orchidaceae | Dwarf Rattlesnake Plantain |
| Gossypium arboreum | | Malvaceae | Cotton |
| Gossypium hirsutum | Gossypium mexicanum, Gossypium religiosum | Malvaceae | Mexican Cotton |
| Gouania leptostachya | Gouania tiliaefolia | Rhamnaceae | Slender Spiked Gouania |
| Grangea maderaspatana | Artemisia maderaspatana, Perdicium tomentosum | Asteraceae | Madras Carpet |
| Graptophyllum pictum | Justicia picta | Acanthaceae | Caricature Plant |
| Grevillea robusta | | Proteaceae | Silver Oak |
| Grewia asiatica | | Tiliaceae | Phalsa |
| Grewia damine | Grewia bicolor, Grewia salvifolia | Tiliaceae | Salvia Leaved Crossberry |
| Grewia flavescens | | Tiliaceae | Donkey Berry |
| Grewia hirsuta | | Tiliaceae | Kukurbicha |
| Grewia laevigata | Grewia disperma, Grewia glabra, Grewia sepiaria | Tiliaceae | Two-Lobed Crossberry |
| Grewia serrulata | | Tiliaceae | Kaori |
| Grewia tenax | | Tiliaceae | White Crossberry |
| Grewia tiliifolia/tiliaefolia | | Tiliaceae | Dhaman |
| Guaiacum officinale | | Zygophyllaceae | Tree of Life |
| Guazuma ulmifolia | Theobroma guazuma, Guazuma tomentosa | Sterculiaceae | West Indian Elm |
| Guizotia abyssinica | Guizotia oleifera, Polymnia abyssinica | Asteraceae | Ramtil |
| Gustavia augusta | Japarandiba augusta | Lecythidaceae | Majestic Heaven Lotus |
| Gustavia superba | | Lecythidaceae | Heaven Lotus |
| Gymnadenia orchidis | Gymnadenia cylindrostachya, Gymnadenia himalayica, Habenaria orchidis, Orchis habenaroides | Orchidaceae | Himalayan Fragrant Orchid |
| Gymnema sylvestre | | Asclepiadaceae | Gurmar |
| Gymnocalycium mihanovichii var. friedrichii | | Cactaceae | Ruby Ball |
| Gymnosporia rothiana | Maytenus rothiana | Celastraceae | Roth's Spike Thorn |
| Gynocardia odorata | Chaulmoogra odorata, Chilmoria dodecandra | Flacourtiaceae | Chhal Mogra |
| Gynura cusimbua | Gynura angulosa, Cacalia cusimbua | Asteraceae | Hill Gynura |
| Gynura pseudochina | Gynura miniata | Asteraceae | Chinese Gynura |
| Gypsophila cerastoides | | Caryophyllaceae | Himalayan Baby's Breath |
| Gypsophila elegans | | Caryophyllaceae | Baby's Breath |
| Gyrocarpus americanus | | Hernandiaceae | Helicopter Tree |
| Habenaria commelinifolia | Orchis stylosanthes, Orchis commelinifolia, Platanthera commelinifolia | Orchidaceae | Commelina-Leaf Habenaria |
| Habenaria digitata | Habenaria trinervia, Habenaria graveolens | Orchidaceae | Green Habenaria |
| Habenaria diphylla | Habenaria jerdoniana | Orchidaceae | Two-Leaved Habenaria |
| Habenaria edgeworthii | Platanthera edgeworthii | Orchidaceae | Edgeworth's Habenaria |
| Habenaria foliosa | | Orchidaceae | Leafy Habenaria |
| Habenaria grandifloriformis | | Orchidaceae | Single Leaved Habenaria |
| Habenaria heyneana | | Orchidaceae | Toothbrush Orchid |
| Habenaria intermedia | Ochyrorchis intermedia, Kryptostoma intermedium | Orchidaceae | Intermediate Habenaria |
| Habenaria longicorniculata | | Orchidaceae | Sheput Habe-amri |
| Habenaria marginata | | Orchidaceae | Golden Yellow Habenaria |
| Habenaria panchganiensis | | Orchidaceae | Panchgani Habenaria |
| Habenaria rariflora | | Orchidaceae | Spreading Flowered Habenaria |
| Habenaria reniformis | | Orchidaceae | Kidney-Leaved Habenaria |
| Habenaria roxburghii | Orchis roxburghii, Orchis plantaginea, Gymnadenia plantaginea | Orchidaceae | Roxburgh's Habenaria |
| Hackelia uncinata | | Boraginaceae | Hooked Stickseed |
| Haldina cordifolia | | Rubiaceae | Haldu |
| Halenia elliptica | Swertia peloris | Gentianaceae | Spurred Gentian |
| Hamelia patens | | Rubiaceae | Firebush |
| Haplanthodes tentaculatus | Haplanthus tentaculatus, Bremekampia tentaculata, Haplanthodes neilgherryensis | Acanthaceae | Tentacled Haplanthodes |
| Haplanthodes verticillatus | | Acanthaceae | Spiny Bottle Brush |
| Haplophragma adenophyllum | Bignonia adenophylla, Fernandoa adenophylla, Spathodea adenophylla | Bignoniaceae | Katsagon |
| Hardwickia binata | | Caesalpiniaceae | Anjan |
| Hedychium aurantiacum | | Zingiberaceae | Orange Ginger Lily |
| Hedychium coronarium | | Zingiberaceae | Butterfly Ginger Lily |
| Hedychium coronarium var. chrysoleucum | | Zingiberaceae | Gold Spot Ginger Lily |
| Hedychium densiflorum | Hedychium sino-aureum | Zingiberaceae | Hardy Ginger Lily |
| Hedychium flavescens | Hedychium coronarium var. flavescens | Zingiberaceae | Yellow Ginger Lily |
| Hedychium gardnerianum | | Zingiberaceae | Kahili Ginger |
| Hedychium marginatum | | Zingiberaceae | Red Ginger Lily |
| Hedychium spicatum | | Zingiberaceae | Spiked Ginger Lily |
| Hedysarum kumaonense | | Fabaceae | Kumaon Sweetvetch |
| Helenium autumnale | | Asteraceae | Helen's Flower |
| Helianthus annuus 'Ring of Fire' | | Asteraceae | Sunflower 'Ring of Fire' |
| Helianthus annuus | | Asteraceae | Sunflower |
| Helianthus debilis | | Asteraceae | Beach Sunflower |
| Helichrysum splendidum | | Asteraceae | Cape Gold |
| Heliconia psittacorum | | Heliconiaceae | Parakeet Flower |
| Heliconia psittacorum x spathocircinata | | Heliconiaceae | Heliconia Golden Torch |
| Heliconia rostrata | | Heliconiaceae | Lobster Claw |
| Heliconia stricta | | Heliconiaceae | Erect Lobster Claw |
| Helicteres isora | | Sterculiaceae | East-Indian Screw Tree |
| Heliopsis helianthoides 'Ballerina' | | Asteraceae | Heliopsis Ballerina |
| Heliotropium curassavicum var. obovatum | | Boraginaceae | Seaside Heliotrope |
| Heliotropium europaeum | | Boraginaceae | Common Heliotrope |
| Heliotropium indicum | | Boraginaceae | Indian Heliotrope |
| Heliotropium ovalifolium | | Boraginaceae | Grey Leaf Heliotrope |
| Heliotropium strigosum | | Boraginaceae | Bristly Heliotrope |
| Hemerocallis fulva | | Liliaceae | Orange Daylily |
| Hemerocallis hybrids | | Liliaceae | Daylily Frans Hals |
| Hemidesmus indicus | | Asclepiadaceae | Indian Sarsaparilla |
| Hemigraphis hirta | Ruellia hitra, Ruellia sarmentosa | Acanthaceae | Hairy Hemigraphis |
| Hemigraphis latebrosa | Ruellia labetrosa | Acanthaceae | Shade Loving Hemigraphis |
| Hemigraphis repanda | Ruellia repanda | Acanthaceae | Dragon's Breath |
| Hemiphragma heterophyllum | | Scrophulariaceae | Nash Jhaar |
| Heracleum lallii | | Apiaceae | Himalayan Hogweed |
| Heracleum nepalense | | Apiaceae | Nepal Hogweed |
| Heritiera littoralis | | Sterculiaceae | Looking Glass Mangrove |
| Heritiera macrophylla | | Sterculiaceae | Large Leaf Looking Glass Tree |
| Herminium lanceum | Ophrys lancea, Satyrium lanceum, Spiranthes lancea | Orchidaceae | Lanceleaf Herminum |
| Herpetospermum pedunculosum | | Cucurbitaceae | Beej Karela |
| Hesperis matronalis | | Brassicaceae | Dame's Rocket |
| Heterophragma quadriloculare | Heterophragma roxburghii, Spathodea roxburghii | Bignoniaceae | Waras |
| Heteropterys angustifolia | | Malpighiaceae | Red Wing |
| Heterostemma dalzellii | Heterostemma wallichii | Asclepiadaceae | Dalzell's Heterostemma |
| Hibiscus caesius | Hibiscus gibsonii, Hibiscus heptaphyllus, Hibiscus pentaphyllus | Malvaceae | Five-Fingered Mallow |
| Hibiscus cannabinus | | Malvaceae | Deccan Hemp |
| Hibiscus hirtus | | Malvaceae | Lesser Mallow orange |
| Hibiscus hirtus | | Malvaceae | Lesser Mallow white |
| Hibiscus lobatus | Solandra lobata, Hibiscus solandra | Malvaceae | Lobed Leaf Mallow |
| Hibiscus micranthus | Hibiscus ovalifolius | Malvaceae | Tiny Flower Hibiscus |
| Hibiscus moscheutos | | Malvaceae | Rose Mallow |
| Hibiscus mutabilis | | Malvaceae | Changeable Rose |
| Hibiscus panduriformis | | Malvaceae | Yellow Hibiscus |
| Hibiscus rosa-sinensis | | Malvaceae | China Rose |
| Hibiscus sabdariffa | | Malvaceae | Roselle |
| Hibiscus sabdariffa var. rubra | | Malvaceae | Red Sorrel |
| Hibiscus schizopetalus | | Malvaceae | Japanese Hibiscus |
| Hibiscus surattensis | Furcaria surattensis | Malvaceae | Bush Sorrel |
| Hibiscus syriacus 'Red Heart' | | Malvaceae | Red Heart Hibiscus |
| Hibiscus syriacus | | Malvaceae | Rose of Sharon |
| Himalaiella yakla | Saussurea yakla | Asteraceae | Yakla Snow Lotus |
| Himalrandia tetrasperma | Gardenia tetrasperma, Randia tetrasperma, Aidia tetrasperma | Rubiaceae | Himalayan Randia |
| Hippeastrum hybrid | | Amaryllidaceae | Amaryllis Lily |
| Hippeastrum puniceum | | Amaryllidaceae | Barbados Lily |
| Hippobroma longiflora | Lobelia longiflora, Isotoma longiflora, Laurentia longiflora | Campanulaceae | Star of Bethlehem |
| Hiptage benghalensis | | Malpighiaceae | Madhavi Lata |
| Hitchenia caulina | Curcuma caulina | Zingiberaceae | Indian Arrowroot |
| Holarrhena pubescens | Holarrhena antidysenterica | Apocynaceae | Indrajao |
| Holboellia latifolia | Stauntonia latifolia | Lardizabalaceae | Sausage Vine |
| Holmskioldia sanguinea | | Verbenaceae | Chinese Hat |
| Holoptelea integrifolia | Ulmus integrifolia | Ulmaceae | Indian Elm |
| Holostemma ada-kodien | Holostemma annulare | Asclepiadaceae | Holostemma Creeper |
| Homonoia riparia | Adelia neriifolia | Euphorbiaceae | Willow-Leaved Water Croton |
| Hordeum vulgare | | Poaceae | Barley |
| Hosta spp. | | Agavaceae | Hosta |
| Houttuynia cordata | | Saururaceae | Chameleon Plant |
| Hoya bella | | Asclepiadaceae | Miniature Wax Plant |
| Hoya carnosa | | Asclepiadaceae | Wax Flower |
| Hoya pubicalyx | | Asclepiadaceae | Pink Silver Wax Flower |
| Hoya verticillata | | Asclepiadaceae | Whorled Wax Flower |
| Hura crepitans | Hura brasiliensis | Euphorbiaceae | Sandbox Tree |
| Hyacinthus orientalis | | Liliaceae | Hyacinth |
| Hybanthus enneaspermus | Ionidium suffruticosum | Violaceae | Spade Flower |
| Hydrangea aspera subsp. robusta | Hydrangea robusta, Hydrangea rosthornii | Hydrangeaceae | Himalayan Tree Hydrangea |
| Hydrangea macrophylla ssp. serrata | Hydrangea serrata var. acuminata, Hydrangea acuminata, Viburnum serratum | Hydrangeaceae | Mountain Hydrangea |
| Hydrangea macrophylla | | Hydrangeaceae | Hydrangea |
| Hydrocotyle javanica | Hydrocotyle hispida, Hydrocotyle nepalensis | Apiaceae | Java Pennywort |
| Hydrocotyle prolifera | Hydrocotyle verticillata var. triradiata, Hydrocotyle triradiata, Hydrocotyle australis | Apiaceae | Whorled Marsh-Pennywort |
| Hydrolea zeylanica | Nama zeylanica | Hydrophyllaceae | Ceylon Hydrolea |
| Hygrophila ringens | Hygrophila erecta | Acanthaceae | Erect Hygrophila |
| Hygrophila schulli | Hygrophila auriculata | Acanthaceae | Marsh Barbel |
| Hygrophila serpyllum | | Acanthaceae | Marsh Carpet |
| Hylocereus undatus | | Cactaceae | Night Blooming Cereus |
| Hymenocallis littoralis | | Amaryllidaceae | Spider Lily |
| Hymenodictyon orixense | Hymenodictyon excelsum, Cinchona excelsa | Rubiaceae | Bridal Couch Tree |
| Hyoscyamus niger | | Solanaceae | Henbane |
| Hypericum choisianum | | Clusiaceae | Hypericum choisianum |
| Hypericum elodeoides | Hypericum napaulense | Clusiaceae | Himalayan St Johns Wort |
| Hypericum mysurense | Norysca mysorensis | Clusiaceae | Mysore St Johns Wort |
| Hypericum oblongifolium | Hypericum cernuum | Clusiaceae | St Johns Wort |
| Hypericum perforatum | | Clusiaceae | Perforate St Johns Wort |
| Hypericum podocarpoides | | Clusiaceae | Narrow-Leaved St Johns Wort |
| Hypoestes phyllostachya | Hypoestes sanguinolenta | Acanthaceae | Polka Dot Plant |
| Hypoxis aurea | Hypoxis minor, Curculigo graminifolia | Hypoxidaceae | Golden Star Grass |
| Hyptis suaveolens | Ballota suaveolens | Lamiaceae | American Mint |
| Iberis amara | | Brassicaceae | Candytuft |
| Iberis umbellata | | Brassicaceae | Globe Candytuft |
| Impatiens acaulis | | Balsaminaceae | Rock Balsam |
| Impatiens arguta | Impatiens gagei | Balsaminaceae | East Himalayan Balsam |
| Impatiens balsamina | | Balsaminaceae | Bicolor Rose Balsam |
| Impatiens balsamina | | Balsaminaceae | Garden Balsam |
| Impatiens bicornuta | | Balsaminaceae | Horned Balsam |
| Impatiens chinensis | Impatiens cosmia, Impatiens crassicornu | Balsaminaceae | Chinese Balsam |
| Impatiens dalzellii | | Balsaminaceae | Dalzell's Yellow Balsam |
| Impatiens inconspicua | Impatiens pusilla | Balsaminaceae | Tiny Balsam |
| Impatiens lawii | | Balsaminaceae | Law's Balsam |
| Impatiens maculata | | Balsaminaceae | Spotted Balsam |
| Impatiens mengtszeana | Impatiens mengtzeana , Impatiens mengtziana | Balsaminaceae | Mengtsze Balsam |
| Impatiens minor | Impatiens kleinii | Balsaminaceae | Lesser Balsam |
| Impatiens oppositifolia | Impatiens rosmarinifolia | Balsaminaceae | Rosemary Leaved Balsam |
| Impatiens pulcherrima | | Balsaminaceae | Handsome Flowered Balsam |
| Impatiens scabrida | Impatiens cristata | Balsaminaceae | Rugged Yellow Balsam |
| Impatiens sulcata | Impatiens gigantea | Balsaminaceae | Gigantic Himalayan Balsam |
| Impatiens tomentosa | Impatiens ramosissima | Balsaminaceae | Marsh Balsam |
| Impatiens walleriana | Impatiens sultani | Balsaminaceae | Sultan's Balsam |
| Impatiens x hawkeri | | Balsaminaceae | New Guinea Balsam |
| Imperata cylindrica | | Poaceae | Cogon Grass |
| Indigofera astragalina | Indigofera hirsuta | Fabaceae | Silky Indigo |
| Indigofera cassioides | Indigofera pulchella, Indigofera leptostachya | Fabaceae | Cassia Indigo |
| Indigofera cordifolia | | Fabaceae | Heart-Leaf Indigo |
| Indigofera dalzellii | Indigofera triquetra | Fabaceae | Shield Indigo |
| Indigofera exilis | | Fabaceae | Slender Indigo |
| Indigofera glandulosa | | Fabaceae | Three Leaf Indigo |
| Indigofera hendecaphylla | Indigofera endecaphylla, Indigofera spicata | Fabaceae | Creeping Indigo |
| Indigofera heterantha | | Fabaceae | Himalayan Indigo |
| Indigofera linifolia | Hedysarum linifolium, Indigofera linifolia var. campbelli | Fabaceae | Narrowleaf Indigo |
| Indigofera linnaei | Indigofera enneaphylla, Hedysarum prostratum | Fabaceae | Birdsville Indigo |
| Indigofera suffruticosa | Indigofera anil | Fabaceae | West Indian Indigo |
| Indigofera tinctoria | | Fabaceae | True Indigo |
| Indigofera trita | Indigofera cineraria, Indigofera timoriensis, Indigofera rigida | Fabaceae | Asian Indigo |
| Indopiptadenia oudhensis | Piptadenia oudhensis | Mimosaceae | Gainti |
| Inula cuspidata | | Asteraceae | Lanceleaf Inula |
| Inula grandiflora | | Asteraceae | Showy Inula |
| Iphigenia pallida | | Liliaceae | Pale Grass Lily |
| Ipomoea alba | | Convolvulaceae | Moon Vine |
| Ipomoea aquatica | | Convolvulaceae | Water Morning Glory |
| Ipomoea arborescens | Convolvulus arborescens | Convolvulaceae | Morning Glory Tree |
| Ipomoea barlerioides | | Convolvulaceae | Pink Morning Glory |
| Ipomoea batatas | | Convolvulaceae | Sweet Potato |
| Ipomoea cairica | | Convolvulaceae | Railway Creeper |
| Ipomoea campanulata | | Convolvulaceae | Tambarvel |
| Ipomoea carnea | | Convolvulaceae | Bush Morning Glory |
| Ipomoea coptica | Convolvulus copticus | Convolvulaceae | Alamo Vine |
| Ipomoea eriocarpa | Ipomoea hispida, Convolvulus hispidus | Convolvulaceae | Tiny Morning Glory |
| Ipomoea hederifolia | Ipomoea coccinea var. hederifolia | Convolvulaceae | Scarlet Morning Glory |
| Ipomoea hederifolia var. lutea | | Convolvulaceae | Yellow Ivy Leaf Morning Glory |
| Ipomoea horsfalliae | | Convolvulaceae | Cardinal Creeper |
| Ipomoea indica | Ipomoea learii, Ipomoea congesta | Convolvulaceae | Blue Dawn Flower |
| Ipomoea laciniata | | Convolvulaceae | Cut-Leaved Morning Glory |
| Ipomoea marginata | Ipomoea sepiaria, Ipomoea maxima, Convolvulus marginatus | Convolvulaceae | Purple Heart Glory |
| Ipomoea mauritiana | Ipomoea digitata, Ipomoea insignis | Convolvulaceae | Giant Potato |
| Ipomoea muricata | Convolvulus muricatus, Ipomoea turbinata, Ipomoea petiolaris | Convolvulaceae | Purple Moonflower |
| Ipomoea nil | Convolvulus nil | Convolvulaceae | Blue Morning Glory |
| Ipomoea obscura | Convolvulus obscurus, Ipomoea fragilis | Convolvulaceae | Obscure Morning Glory |
| Ipomoea pes-caprae | | Convolvulaceae | Goat Foot Vine |
| Ipomoea pes-tigridis | | Convolvulaceae | Tiger Foot Morning Glory |
| Ipomoea purpurea | | Convolvulaceae | Common Morning Glory |
| Ipomoea quamoclit | | Convolvulaceae | Cypress Vine |
| Ipomoea sinensis | Convolvulus calycinus, Convolvulus hardwickii, Ipomoea calycina | Convolvulaceae | Chinese Morning Glory |
| Ipomoea triloba | | Convolvulaceae | Little Bell |
| Ipomoea violacea | Convolvulus tuba, Ipomoea macrantha, Ipomoea tuba | Convolvulaceae | Beach Moonflower |
| Iresine herbstii | | Amaranthaceae | Bloodleaf |
| Iris domestica | Belamcanda chinensis | Iridaceae | Leopard Flower |
| Iris germanica | | Iridaceae | Bearded Iris |
| Iris japonica | Iris fimbriata, Iris chinensis | Iridaceae | Fringed Iris |
| Iris kemaonensis | | Iridaceae | Kumaon Iris |
| Iris macrosiphon | | Iridaceae | Ground Iris |
| Iris milesii | | Iridaceae | Red Flower Iris |
| Iris pseudacorus | | Iridaceae | Yellow Iris |
| Iris tectorum | | Iridaceae | Roof Iris |
| Iris versicolor | | Iridaceae | Blue Flag Iris |
| Iris virginica | | Iridaceae | Virginia Iris |
| Isodon lophanthoides | Rabdosia lophanthoides, Plectranthus striatus, Hyssopus lophanthoides | Lamiaceae | Crested Flower Isodon |
| Isodon rugosus | Plectranthus rugosus, Isodon plecranthoides | Lamiaceae | Wrinkled Leaf Isodon |
| Ixora brachiata | | Rubiaceae | Gorbale |
| Ixora chinensis | | Rubiaceae | Chinese Ixora |
| Ixora coccinea | | Rubiaceae | Ixora pink |
| Ixora coccinea | | Rubiaceae | Ixora red |
| Ixora coccinea | | Rubiaceae | Ixora yellow |
| Ixora elongata | Ixora pedunculata | Rubiaceae | Rosy Ixora |
| Ixora pavetta | Ixora arborea, Ixora parviflora, Ixora decipiens | Rubiaceae | Small Flowered Ixora |
| Jacaranda mimosifolia | | Bignoniaceae | Blue Jacaranda |
| Jacaranda obtusifolia ssp. rhombifolia | Jacaranda filicifolia, Bignonia filicifolia, Jacaranda rhombifolia | Bignoniaceae | Fern Leaf Jacaranda |
| Jacobaea raphanifolia | Senecio diversifolius | Asteraceae | Diverse Leaved Senecio |
| Jacquemontia paniculata var. paniculata | Ipomoea paniculata, Convolvulus parviflorus, Convolvulus violaceus | Convolvulaceae | Mauve Clustervine |
| Jacquemontia pentanthos | Jacquemontia violacea, Jacquemontia pentantha | Convolvulaceae | Skyblue Clustervine |
| Jacquinia macrocarpa | Jacquinia aurantica | Theophrastaceae | Jacquinia |
| Jansenella griffithiana | Arundinella avenacea, Arundinella griffithiana | Poaceae | Jansen Grass |
| Jasminum angustifolium | | Oleaceae | Wild Jasmine |
| Jasminum auriculatum | Jasminum molle | Oleaceae | Juhi |
| Jasminum azoricum | Jasminum trifoliatum | Oleaceae | Azores Jasmine |
| Jasminum elongatum | Jasminum undulatum | Oleaceae | Red Kundo |
| Jasminum fluminense | | Oleaceae | River Jasmine |
| Jasminum humile | Jasminum wallichianum, Jasminum revolutum, Jasminum pubigerum | Oleaceae | Yellow Jasmine |
| Jasminum malabaricum | | Oleaceae | Malabar Jasmine |
| Jasminum mesnyi | Jasminum primulinum | Oleaceae | Primrose Jasmine |
| Jasminum multiflorum | Jasminum pubescens | Oleaceae | Kunda |
| Jasminum nervosum | | Oleaceae | Wild Kundo |
| Jasminum nitidum | | Oleaceae | Angelwing Jasmine |
| Jasminum officinale | | Oleaceae | Common Jasmine |
| Jasminum polyanthum | | Oleaceae | Pink Jasmine |
| Jasminum sambac var. 'Belle of India' | | Oleaceae | Madan Mogra |
| Jasminum sambac var. 'Grand Duke Of Tuscany' | | Oleaceae | Butt Mogra |
| Jasminum sambac var. 'Maid of Orleans' | | Oleaceae | Bela |
| Jatropha curcas | | Euphorbiaceae | Physic Nut |
| Jatropha gossypiifolia | | Euphorbiaceae | Bellyache Bush |
| Jatropha integerrima | | Euphorbiaceae | Peregrina |
| Jatropha integerrima | | Euphorbiaceae | Peregrina pink |
| Jatropha multifida | | Euphorbiaceae | Coral Bush |
| Jatropha podagrica | | Euphorbiaceae | Australian Bottle Plant |
| Joannesia princeps | | Euphorbiaceae | Arara Nut Tree |
| Juncus himalensis | | Juncaceae | Himalayan Rush |
| Juncus thomsonii | | Juncaceae | Thomson's Rush |
| Justicia adhatoda | Adhatoda vasica, Adhatoda zeylanica | Acanthaceae | Malabar Nut |
| Justicia aurea | | Acanthaceae | Yellow Jacobinia |
| Justicia betonica | | Acanthaceae | Squirrel Tail |
| Justicia brandegeana | | Acanthaceae | Shrimp Plant |
| Justicia carnea | | Acanthaceae | Pink Jacobinia |
| Justicia gendarussa | Gendarussa vulgaris, Adhatoda subserrata | Acanthaceae | Gandarusa |
| Justicia glauca | | Acanthaceae | Glaucous Justicia |
| Justicia procumbens | | Acanthaceae | Water Willow |
| Justicia santapaui | Justicia montana, Justicia andersonii | Acanthaceae | Santapau's Justicia |
| Justicia spicigera | Jacobinia spicigera, Justicia ghiesbreghtiana, Justicia sidicaro | Acanthaceae | Mexican Honeysuckle |
| Justicia trinervia | | Acanthaceae | Three Nerved Squirrel Tail |
| Kaempferia galanga | | Zingiberaceae | Aromatic Ginger |
| Kaempferia laotica | | Zingiberaceae | Peacock Ginger |
| Kaempferia pulchra | | Zingiberaceae | Resurrection Lily |
| Kaempferia rotunda | | Zingiberaceae | Bhumi Champa |
| Kaempferia scaposa | | Zingiberaceae | Scaped Ginger |
| Kalanchoe blossfeldiana | | Crassulaceae | Flaming Katy |
| Kalanchoe gastonis-bonnieri | | Crassulaceae | Palm Beachbells |
| Kalanchoe orgyalis | Kalanchoe antanosiana | Crassulaceae | Copper Spoons |
| Kalanchoe pinnata | Cotyledon pinnata, Bryophyllum pinnatum | Crassulaceae | Air Plant |
| Kerria japonica 'Pleniflora' | | Rosaceae | Kerria double |
| Khaya senegalensis | Swietenia senegalensis | Meliaceae | African Mahogany |
| Kickxia ramosissima | Linaria ramosissima | Scrophulariaceae | Branched Cancerwort |
| Kigelia africana | Crescentia pinnata, Kigelia pinnata | Bignoniaceae | Sausage Tree |
| Kleinhovia hospita | | Sterculiaceae | Guest Tree |
| Kniphofia spp. | | Asphodelaceae | Torch Lily |
| Knoxia spp. | | Rubiaceae | Knoxia |
| Kochia scoparia | | Chenopodiaceae | Summer Cypress |
| Koelreuteria paniculata | | Sapindaceae | Golden Rain Tree |
| Kohleria eriantha | | Gesneriaceae | Kohleria |
| Kopsia fruticosa | | Apocynaceae | Shrub Vinca |
| Kydia calycina | | Malvaceae | Kydia |
| Kyllinga nemoralis | Cyperus kyllingia | Cyperaceae | White Water Sedge |
| Lablab purpureus | Dolichos lablab, Dolichos purpureus | Fabaceae | Lablab Bean |
| Lactuca dolichophylla | Lactuca longifolia | Asteraceae | Long Leaved Lettuce |
| Lactuca sativa | | Asteraceae | Lettuce |
| Laelia anceps | | Orchidaceae | Laelia Orchid pink |
| Lagascea mollis | | Asteraceae | Silk Leaf |
| Lagenaria siceraria | | Cucurbitaceae | Bottle Gourd |
| Lagerstroemia duperreana | Lagerstroemia thorellii | Lythraceae | Thorel's Crape Myrtle |
| Lagerstroemia floribunda | Lagerstroemia turbinata | Lythraceae | Tropical Crape Myrtle |
| Lagerstroemia indica | | Lythraceae | Common Crape Myrtle |
| Lagerstroemia microcarpa | Lagerstroemia lanceolata | Lythraceae | Ben Teak |
| Lagerstroemia speciosa | | Lythraceae | Queen Crape Myrtle |
| Lagerstroemia tomentosa | | Lythraceae | White Crape Myrtle |
| Lagotis cashmeriana | | Scrophulariaceae | Kashmir Lagotis |
| Lamium album | | Lamiaceae | White Dead Nettle |
| Lampranthus aureus | Mesembryanthemum aureum | Aizoaceae | Golden Ice Plant |
| Lampranthus productus | Mesembryanthemum productum | Aizoaceae | Purple Ice Plant |
| Lannea coromandelica | Dialium coromandelicum, Lannea grandis, Odina wodier | Anacardiaceae | Indian Ash Tree |
| Lantana camara var. aculeata | | Verbenaceae | Lantana |
| Lantana involucrata | Lantana odorata | Verbenaceae | White Lantana |
| Lantana montevidensis | | Verbenaceae | Trailing Lantana |
| Laportea interrupta | Fleurya interrupta, Urtica interrupta | Urticaceae | Hen's Nettle |
| Lathyrus odoratus | | Fabaceae | Sweet Pea |
| Lathyrus sativus | | Fabaceae | Grass Pea |
| Launaea procumbens | | Asteraceae | Creeping Launaea |
| Lavandula angustifolia subsp. angustifolia | Lavandula vera, Lavandula officinalis, Lavandula spica | Lamiaceae | Common Lavender |
| Lavandula bipinnata | Lavandula burmanni, Bystropogon bipinnatus | Lamiaceae | Feather Leaved Lavender |
| Lawsonia inermis | | Lythraceae | Henna |
| Ledebouria revoluta | Scilla hyacinthina | Liliaceae | South Indian Squill |
| Leea asiatica | Leea aspera, Leea crispa, Phytolacca asiatica | Leeaceae | Banchalita |
| Leea coccinea 'Rubra' | Leea rubra | Leeaceae | Red Leea |
| Leea indica | | Leeaceae | Bandicoot Berry |
| Leea macrophylla | Leea integrifolia, Leea latifolia | Leeaceae | Hathikana |
| Leonotis nepetifolia | Phlomis nepetifolia | Lamiaceae | Lion's Ear |
| Leontopodium himalayanum | | Asteraceae | Himalayan Edelweiss |
| Leontopodium jacotianum | Leontopodium alpinum var. alpinum | Asteraceae | Edelweiss |
| Leonurus cardiaca | | Lamiaceae | Motherwort |
| Leonurus japonicus | Leonurus sibiricus | Lamiaceae | Honeyweed |
| Lepidagathis bandraensis | | Acanthaceae | Bandra Lepidagathis |
| Lepidagathis cristata | | Acanthaceae | Crested Lepidagathis |
| Lepidagathis cuspidata | | Acanthaceae | Spiny Lepidagathis |
| Lepidagathis incurva | | Acanthaceae | Curved Lepidagathis |
| Lepidagathis lutea | | Acanthaceae | Yellow Lepidagathis |
| Lepidium apetalum | Lepidium micranthum | Brassicaceae | Common Peppergrass |
| Lepisanthes tetraphylla | Sapindus tetraphylla, Otophora spectabilis, Lepisanthes eriolepis | Sapindaceae | Kurpa |
| Leptodermis kumaonensis | | Rubiaceae | Kumaon Leptodermis |
| Leucaena leucocephala | Leucaena latisiliqua | Fabaceae | Wild Tamarind |
| Leucanthemum vulgare | Chrysanthemum leucanthemum | Asteraceae | Oxeye Daisy |
| Leucanthemum X superbum | Chrysanthemum maximum | Asteraceae | Shasta Daisy |
| Leucas aspera | | Lamiaceae | Common Leucas |
| Leucas ciliata | | Lamiaceae | Tufted Leucas |
| Leucas lamifolia | | Lamiaceae | Mint Leaved Leucas |
| Leucas lanata | | Lamiaceae | Woolly Leucas |
| Leucas marrubioides | | Lamiaceae | Horehound Leucas |
| Leucas stelligera | | Lamiaceae | Starry Leucas |
| Leucophyllum frutescens | | Scrophulariaceae | Purple Sage |
| Leycesteria formosa | | Caprifoliaceae | Himalayan Honeysuckle |
| Liatris spicata | | Asteraceae | Gayfeather |
| Ligularia amplexicaulis | | Asteraceae | Stem Clasping Ligularia |
| Ligustrum indicum | Ligustrum nepalense | Oleaceae | Indian Privet |
| Ligustrum perrottetii | Ligustrum neilgherrense | Oleaceae | Nilgiri Privet |
| Lilium chitrangadae | | Liliaceae | Dzukou Lily |
| Lilium mackliniae | | Liliaceae | Siroi Lily |
| Lilium nanum | Nomocharis nana, Fritillaria gardneriana, Fritillaria stracheyi | Liliaceae | Tiny Lily |
| Lilium oxypetalum | | Liliaceae | Yellow Himalayan Lily |
| Lilium x asiatica | | Liliaceae | Asiatic Lily |
| Limnophila indica | Hottonia indica, Limnophila gratioloides | Scrophulariaceae | Indian Marshweed |
| Limnophyton obtusifolium | Sagittaria obtusifolia, Alisma obtusifolium, Alisma sagittifolium | Alismataceae | Blunt Arrowhead |
| Limonia acidissima | Feronia elephantum, Feronia limonia, Schinus limonia | Rutaceae | Wood Apple |
| Limonium sinuatum | | Plumbaginaceae | Sea Lavender |
| Linaria maroccana | | Scrophulariaceae | Toadflax |
| Lindelofia anchusoides | | Boraginaceae | Asian Hound's Tongue |
| Lindenbergia grandiflora | | Scrophulariaceae | Lindenbergia |
| Lindenbergia indica | Lindenbergia urticifolia | Scrophulariaceae | Nettle Leaved Lindenbergia |
| Lindenbergia muraria | Stemodia muraria, Lindenbergia urticifolia | Scrophulariaceae | Wall Lindenbergia |
| Lindernia ciliata | Bonnaya brachiata, Gratiola ciliata | Scrophulariaceae | Fringed False Pimpernel |
| Lindernia crustacea | Capraria crustacea, Vandellia crustacea | Scrophulariaceae | Brittle False Pimpernel |
| Lindernia nummulariifolia | | Scrophulariaceae | False Pimpernel |
| Lindernia parviflora | Bonnaya parviflora, Ilysanthes parviflora | Scrophulariaceae | Small-Flowered Lindernia |
| Lindernia ruellioides | Bonnaya reptans | Scrophulariaceae | Duckbill Pimpernel |
| Lindernia viscosa | Gratiola viscosa, Hornemannia viscosa, Lindernia cruciformis, Vandellia viscosa | Scrophulariaceae | Sticky False Pimpernel |
| Linum grandiflorum | Linum rubrum, Linum grandiflorum var rubrum | Linaceae | Scarlet Flax |
| Linum mysorense | Linum mysurense | Linaceae | Mysore Flax |
| Linum usitatissimum | | Linaceae | Flax |
| Liriodendron tulipifera | | Magnoliaceae | Tulip Tree |
| Liriope muscari | | Liliaceae | Lily Turf |
| Litchi chinensis | | Sapindaceae | Leechee |
| Lithocarpus pachyphyllus | Quercus pachyphylla, Pasania pachyphylla, Synaedrys pachyphylla | Fagaceae | Thick Leaved Oak |
| Litsea deccanensis | Litsea tomentosa, Tetranthera tomentosa | Lauraceae | Deccan Tallow Laurel |
| Litsea glutinosa | Litsea laurifolia, Sebifera glutinosa, Tetranthera laurifolia | Lauraceae | Indian Laurel |
| Litsea monopetala | Litsea polyantha, Tetranthera monopetala, Tetranthera alnoides | Lauraceae | Meda |
| Livistona chinensis | | Arecaceae | Chinese Fan Palm |
| Lloydia longiscapa | | Liliaceae | Tall Alplily |
| Lloydia serotina | | Liliaceae | Snowdon Alplily |
| Lobelia alsinoides | Lobelia trigona | Campanulaceae | Chickweed Lobelia |
| Lobelia erinus | | Campanulaceae | Trailing Lobelia |
| Lobelia nicotianifolia | Lobelia nicotianaefolia | Campanulaceae | Wild Tobacco |
| Lobelia seguinii | | Campanulaceae | Seguin's Lobelia |
| Lobularia maritima | | Cruciferae/Brassicaceae | Sweet Alyssum |
| Lonicera japonica | | Caprifoliaceae | Japanese Honeysuckle |
| Lonicera obovata | Lonicera parvifolia | Caprifoliaceae | Blueberry Honeysuckle |
| Lonicera periclymenum 'Serotina' | | Caprifoliaceae | Dutch Honeysuckle |
| Lonicera quinquelocularis | Lonicera translucens | Caprifoliaceae | Translucent Honeysuckle |
| Luculia gratissima | Mussaenda luculia, Cinchona gratissima | Rubiaceae | Pleasant Luculia |
| Luculia pinceana | | Rubiaceae | Pince's Luculia |
| Ludwigia adscendens | | Onagraceae | Water Primrose |
| Ludwigia octovalvis | | Onagraceae | Willow Primrose |
| Luffa acutangula | | Cucurbitaceae | Ribbed Sponge Gourd |
| Luffa aegyptiaca | Cucurbita luffa, Luffa cylindrica, Luffa pentandra, Momordica cylindrica | Cucurbitaceae | Sponge Gourd |
| Luffa echinata | | Cucurbitaceae | Bitter Sponge Gourd |
| Lunaria annua | | Brassicaceae | Honesty |
| Lupinus spp. | | Fabaceae | Lupin |
| Luvunga scandens | Limonia scandens | Rutaceae | Lavang Lata |
| Lycianthes rantonnetii | Solanum rantonnettii | Solanaceae | Blue Potato Bush |
| Lycium edgeworthii | Lycium indicum, Lycium europeum | Solanaceae | Indian Box Thorn |
| Lycopersicon esculentum | | Solanaceae | Tomato |
| Lyonia ovalifolia | Xolisma ovalifolia, Pieris ovalifolia, Andromeda ovalifoli | Ericaceae | Oval Leaved Staggerbush |
| Lyonia villosa | Pieris villosa | Ericaceae | Hairy Staggerbush |
| Lysimachia obovata | | Primulaceae | Manipur Loosestrife |
| Macaranga peltata | Macaranga roxburghii, Tanarius peltatus, Mappa peltata | Euphorbiaceae | Chandada |
| Macfadyena unguis-cati | Doxantha unguis-cati | Bignoniaceae | Cat's Claw |
| Mackenziea integrifolia | Endopogon integrifolius, Leptacanthus alatus, Strobilanthes perfoliatus | Acanthaceae | Wayti |
| Maclura cochinchinensis | Vanieria cochinchinensis, Cudrania javanensis, Cudrania cochinchinensis | Moraceae | Cockspur Thorn |
| Macroptilium lathyroides | Phaseolus lathyroides, Phaseolus semierectus, Macroptilium lathyroides var. semierectum | Fabaceae | Cow Pea |
| Macrosolen capitellatus | Loranthus capitellatus | Loranthaceae | South Indian Mistletoe |
| Macrosolen parasiticus | Lonicera parasitica, Loranthus loniceroides | Loranthaceae | Parasite Honeysuckle |
| Madhuca longifolia var. latifolia | Bassia latifolia, Illipe latifolia, Madhuca indica, Madhuca latifolia | Sapotaceae | Mahua |
| Madhuca longifolia var. longifolia | | Sapotaceae | South Indian Mahua |
| Madhuca neriifolia | Madhuca malabarica, Basia malabarica, Illipe malabarica | Sapotaceae | Illipe Butter Tree |
| Maerua arenaria | Maerua ovalifolia, Maerua scabra, Niebuhria arenaria | Capparaceae | Desert Maerua |
| Maesa indica | Baeobotrys indica, Maesa dubia, Maesa indica var. perrottetiana | Myrtaceae | Wild Berry |
| Magnolia campbelli | | Magnoliaceae | Campbell's Magnolia |
| Magnolia champaca | Michelia champaca | Magnoliaceae | Champa |
| Magnolia champaca | Michelia champaca | Magnoliaceae | Golden Champa |
| Magnolia coco | | Magnoliaceae | Dwarf Magnolia |
| Magnolia figo | Magnolia annonifolia, Michelia figo, Liriodendron figo | Magnoliaceae | Banana Shrub |
| Magnolia grandiflora | | Magnoliaceae | Magnolia |
| Magnolia liliifera | Talauma candollei | Magnoliaceae | Egg Magnolia |
| Magnolia liliiflora | Magnolia lilliflora | Magnoliaceae | Lily Magnolia |
| Magnolia x soulangiana | | Magnoliaceae | Saucer Magnolia |
| Mahonia napaulensis | | Berberidaceae | Nepal Mahonia |
| Maianthemum purpureum | Smilacina purpurea, Smilacina pallida, Smilacina purpurea f. albiflora | Liliaceae | Himalayan Mayflower |
| Maianthemum purpureum | Smilacina purpurea, Smilacina pallida, Smilacina purpurea var. albiflora | Liliaceae | Purple Mayflower |
| Majidea zanguebarica | Majidea zanquebarica, Majidea zanguibarica | Sapindaceae | Black Pearl Tree |
| Malachra capitata | Sida capitata | Malvaceae | Brazil Jute |
| Malaxis acuminata | Microstylis wallichii | Orchidaceae | Jeevak |
| Malaxis cylindrostachya | Dienia cylindrostachya, Microstylis cylindrostachya | Orchidaceae | Adder Mouth Orchid |
| Mallotus nudiflorus | Trewia nudiflora | Euphorbiaceae | False White Teak |
| Mallotus philippensis | | Euphorbiaceae | Kamala Tree |
| Malpighia coccigera | | Malpighiaceae | Miniature Holly |
| Malpighia glabra | | Malpighiaceae | Barbados Cherry |
| Malus domestica | | Rosaceae | Apple |
| Malus floribunda | | Rosaceae | Crab Apple red |
| Malva microcarpa | Malva parviflora var. microcarpa | Malvaceae | Least Mallow |
| Malva neglecta | Malva rotundifolia | Malvaceae | Common Mallow |
| Malva pusilla | Malva rotundifolia, Malva borealis | Malvaceae | Small Mallow |
| Malvastrum coromandelianum | Malva coromandeliana, Malvastrum tricuspidatum | Malvaceae | False Mallow |
| Malva sylvestris | | Malvaceae | High Mallow |
| Malvaviscus arboreus var. arboreus | Malvaviscus arboreus var. mexicanus | Malvaceae | Sleeping Hibiscus |
| Malvaviscus arboreus var. drummondii | Malvaviscus drummondii | Malvaceae | Wax Mallow |
| Mammea suriga | | Clusiaceae | Surangi |
| Mammillaria longimamma | | Cactaceae | Nipple Cactus |
| Mammillaria plumosa | Ebnerella plumosa, Chilita plumosa | Cactaceae | Feather Cactus |
| Mammillaria pseudoperbella | | Cactaceae | Pretty Nipple Cactus |
| Mandragora officinarum | | Solanaceae | Mandrake |
| Mangifera indica | | Anacardiaceae | Mango |
| Mangium montanum | | Fabaceae | Black Wattle |
| Manihot esculenta | Jatropha manihot, Jatropha dulcis | Euphorbiaceae | Tapioca |
| Manilkara hexandra | Mimusops hexandra | Sapotaceae | Ceylon Iron Wood |
| Manilkara zapota | | Sapotaceae | Chikoo |
| Maranta leuconeura | | Marantaceae | Prayer Plant |
| Markhamia lutea | | Bignoniaceae | Markhamia |
| Martynia annua | | Martyniaceae | Devils Claws |
| Matricaria chamomilla | Chamomilla recutita | Asteraceae | Chamomilla |
| Matthiola incana | | Brassicaceae | Garden Stock |
| Maytenus senegalensis | Celastrus senegalensis, Maytenus emarginata, Celastrus montana, Gymnosporia montana | Celastraceae | Red Spike Thorn |
| Mazus pumilus | | Scrophulariaceae | Asian Mazus |
| Mazus surculosus | Mazus harmandii | Scrophulariaceae | Suckering Mazus |
| Mecardonia procumbens | Bacopa procumbens, Erinus procumbens | Scrophulariaceae | Baby Jump Up |
| Meconopsis aculeata | | Papaveraceae | Blue Poppy |
| Meconopsis bella | | Papaveraceae | Pretty Blue Poppy |
| Meconopsis dhwojii | | Papaveraceae | Himalayan Yellow Poppy |
| Meconopsis paniculata | | Papaveraceae | Panicled Yellow Poppy |
| Meconopsis simplicifolia | | Papaveraceae | Common Blue Poppy |
| Medicago polymorpha var. polymorpha | Medicago denticulata | Fabaceae | Bur Clover |
| Megaskepasma erythrochlamys | | Acanthaceae | Brazilian Red Cloak |
| Melaleuca bracteata | Melaleuca genistifolia, Melaleuca monticola | Myrtaceae | Golden Bottle Brush |
| Melaleuca leucadendron | | Myrtaceae | Cajuput Tree |
| Melampodium divaricatum | Dysodium divaricatum, Melampodium paludosum | Asteraceae | Butter Daisy |
| Melanthera biflora | Wedelia biflora | Asteraceae | Sea Daisy |
| Melastoma malabathricum ssp. malabathricum | | Melastomataceae | Malabar Melastome |
| Melastoma malabathricum subsp.normale | Melastoma normale | Melastomataceae | Himalayan Melastome |
| Melia azedarach | Melia azedarach var. japonica, Melia toosendan | Meliaceae | Persian Lilac |
| Melilotus alba | | Fabaceae | White Sweet Clover |
| Melilotus indica | Trifolium indicum, Melilotus parviflorus | Fabaceae | Indian Sweet Clover |
| Melinis repens | Saccharum repens, Rhynchelytrum repens, Tricholaena rosea | Poaceae | Natal Grass |
| Melochia corchorifolia | | Sterculiaceae | Chocolate Weed |
| Melochia pyramidata | | Sterculiaceae | Pyramid Flower |
| Memecylon umbellatum | Memecylon edule | Melastomataceae | Ironwood Tree |
| Mentha longifolia | | Lamiaceae | Horse Mint |
| Mentha × piperita | Mentha piperata, Mentha piperita | Lamiaceae | Peppermint |
| Mentha spicata | | Lamiaceae | Spearmint |
| Meriandra benghalensis | Salvia bengalensis | Lamiaceae | Bengal Sage |
| Merremia gangetica | Merremia emarginata, Convolvulus reniformis, Ipomoea reniformis | Convolvulaceae | Kidney Leaf Morning Glory |
| Merremia hederacea | Evolvulus hederaceus, Ipomoea chryseides, Merremia chryseides, Merremia convolvulacea | Convolvulaceae | Ivy Woodrose |
| Merremia quinquefolia | Ipomoea quinquefolia, Convolvulus quinquefolia | Convolvulaceae | Five-Fingered Morning Glory |
| Merremia umbellata | Convolvulus umbellatus, Ipomoea cymosa, Ipomoea polyanthes | Convolvulaceae | Hogvine |
| Merremia vitifolia | Convolvulus vitifolius, Ipomoea vitifolia | Convolvulaceae | Grape-leaf Wood Rose |
| Mesua ferrea | | Clusiaceae | Nag Kesar |
| Meyna laxiflora | Vangueria spinosa | Rubiaceae | Muyna |
| Microcos paniculata | Grewia microcos | Tiliaceae | Shiral |
| Micromeria biflora | Thymus biflorus, Satureja biflora, Clinopodium biflorum | Lamiaceae | Lemon Savory |
| Microstachys chamaelea | Tragia chamaelea, Sebastiana chamaelea | Euphorbiaceae | Creeping Sebastiana |
| Mikania micrantha | Mikania cordata var. indica | Asteraceae | Climbing Hempweed |
| Millettia peguensis | Pongamia ovalifolia,Millettia ovalifolia | Fabaceae | Moulmein Rosewood |
| Millettia pinnata | Pongamia pinnata, Pongamia glabra, Derris indica, Cytisus pinnatus | Fabaceae | Pongam Tree |
| Millingtonia hortensis | | Bignoniaceae | Indian Cork Tree |
| Mimosa hamata | Mimosa armata | Mimosaceae | Hooked Mimosa |
| Mimosa pudica | | Mimosaceae | Touch Me Not |
| Mimulus hybrid | | Scrophulariaceae | Monkey Flower hybrid |
| Mimulus lewisii | | Scrophulariaceae | Monkey Flower purple |
| Mimulus nepalensis | Mimulus assamicus | Scrophulariaceae | Nepal Monkey Flower |
| Mimusops elengi | | Sapotaceae | Maulsari |
| Mirabilis jalapa | | Nyctaginaceae | Four O'clock |
| Mitragyna parvifolia | | Rubiaceae | Kaim |
| Mokara spp. | | Orchidaceae | Mokara Orchid |
| Mokara spp. | | Orchidaceae | Mokara Red |
| Mollugo pentaphylla | Mollugo stricta | Molluginaceae | Five Leaved Carpetweed |
| Molucca laevis | | Acanthaceae | Bells of Ireland |
| Momordica charantia | | Cucurbitaceae | Bitter Gourd |
| Momordica cochinchinensis | | Cucurbitaceae | Chinese Cucumber |
| Momordica dioica | | Cucurbitaceae | Ban Karela |
| Monochoria hastata | | Pontederiaceae | Arrow Leaf Pondweed |
| Monochoria vaginalis | | Pontederiaceae | Oval Leaf Pondweed |
| Monotropa uniflora | | Ericaceae | Indian Pipe |
| Monstera deliciosa | | Araceae | Split Leaf Philodendron |
| Montanoa grandiflora | Eriocoma hartwegiana | Asteraceae | Tree Daisy |
| Morina longifolia | | Dipsacaceae | Himalayan Whorlflower |
| Morinda citrifolia | | Rubiaceae | Great Morinda |
| Morinda pubescens | Morinda tinctoria, Morinda tomentosa, Morinda tinctoria var. tomentosa | Rubiaceae | Indian Mulberry |
| Moringa concanensis | | Moringaceae | Konkan Moringa |
| Moringa oleifera | | Moringaceae | Drumstick Tree |
| Morus alba | | Moraceae | White Mulberry |
| Morus macroura | Morus alba var. laevigata, Morus laevigata | Moraceae | Himalayan Mulberry |
| Moullava spicata | Wagatea spicata, Caesalpinia spicata | Caesalpiniaceae | Candy Corn Plant |
| Mucuna monosperma | Stizolobium rugosum | Fabaceae | Negro Bean |
| Mucuna pruriens | | Fabaceae | Velvet Bean |
| Muhlenbergia capillaris | | Poaceae | Pink Mist Grass |
| Muntingia calabura | | Elaeocarpaceae | Jamaica Cherry |
| Murdannia lanuginosa | | Commelinaceae | Marsh Dewflower |
| Murdannia nudiflora | Commelina nudiflora, Aneilema nudiflorum, Ditelesia nudiflora | Commelinaceae | Naked-Stem Dewflower |
| Murdannia pauciflora | Phaeneilema pauciflorum, Murdannia wightii | Commelinaceae | Few Flowered Dewflower |
| Murdannia semiteres | Aneilema semiteres, Dichaespermum semiteres, Murdannia paniculata | Commelinaceae | Panicled Dewflower |
| Murdannia spirata | Commelina spirata, Aneilema spiratum, Aphylax spiralis | Commelinaceae | Asiatic Dewflower |
| Murdannia versicolor | Aneilema versicolor, Phaeneilema versicolor | Commelinaceae | Changing Color Dewflower |
| Murraya paniculata | Murraya exotica | Rutaceae | Kamini |
| Musa coccinea | Musa uranoscopos | Musaceae | Scarlet Banana |
| Musa ornata | Musa mexicana | Musaceae | Bronze Banana |
| Musa paradisiaca | | Musaceae | Banana |
| Musa velutina | | Musaceae | Velvet Pink Banana |
| Muscari armeniacum | | Hyacinthaceae | Grape Hyacinth |
| Mussaenda erythophylla | | Rubiaceae | Mussaenda |
| Mussaenda luteola/glabra/incana | | Rubiaceae | Dwarf Mussaenda |
| Mussaenda phillipica | | Rubiaceae | Mussaenda white |
| Myosotis alpestris | | Boraginaceae | Alpine Forget-Me-Not |
| Myosoton aquaticum | Cerastium aquaticum, Stellaria aquatica | Caryophyllaceae | Water Chickweed |
| Myriactis nepalensis | Lavenia dentata, Lavenia sphaerantha, Myriactis wallichii | Asteraceae | Nepal Myriactis |
| Nanothamnus sericeus | | Asteraceae | Silky Dwarf Bush |
| Narcissus spp. | | Amaryllidaceae | Nargis |
| Naregamia alata | | Meliaceae | Goanese Ipecac |
| Neanotis lancifolia | Hedyotis lancifolia, Oldenlandia lancifolia | Rubiaceae | Starviolet |
| Neanotis montholonii | | Rubiaceae | Montholon's Neanotis |
| Neanotis sahyadrica | | Rubiaceae | Sahyadri Neanotis |
| Nelsonia canescens | Justicia canescens, Justicia brunelloides, Nelsonia brunelloides | Acanthaceae | Blue Pussyleaf |
| Nelumbo nucifera | Nelumbium speciosum | Nelumbonaceae | Lotus |
| Nemesia strumosa | | Scrophulariaceae | Nemesia |
| Neolamarckia cadamba | Anthocephalus cadamba, Anthocephalus indicus | Rubiaceae | Kadam |
| Neomarica gracilis | | Iridaceae | Walking Iris |
| Neoregelia concentrica | | Bromeliaceae | Concentric Neoregelia |
| Nepenthes khasiana | | Nepenthaceae | Indian Pitcher Plant |
| Nepeta cataria | | Lamiaceae | Catnip |
| Nepeta connata | | Lamiaceae | Violet Himalayan Catmint |
| Nepeta laevigata | Betonica laevigata, Nepeta spicata, Nepeta nuristanica | Lamiaceae | Smooth Catmint |
| Nepeta lamiopsis | | Lamiaceae | Dwarf Himalayan Catmint |
| Nepeta leucophylla | | Lamiaceae | White Leaved Catmint |
| Nepeta spp. | | Lamiaceae | Pink Catmint |
| Neptunia oleracea | Neptunia natans, Neptunia prostrata | Mimosaceae | Sensitive Water Plant |
| Neptunia triquetra | Desmanthus triquetris, Desmanthus triquetrus, Mimosa triquetra | Mimosaceae | Yellow Sensitive Plant |
| Nerine sarniensis | | Amaryllidaceae | Red Nerine Lily |
| Nerium oleander | Nerium indicum | Apocynaceae | Oleander |
| Nervilia aragoana | | Orchidaceae | Aragoa-Like Nervilia |
| Nervilia crociformis | Bolborchis crociformis, Pogonia crispata, Nervilia crispata, Nervilia fimbriata | Orchidaceae | Trembling Nervilia |
| Neuracanthus sphaerostachyus | | Acanthaceae | Pin Cushion Plant |
| Neuracanthus trinervius | | Acanthaceae | Nilgonda |
| Nicandra physaloides | | Solanaceae | Shoofly Plant |
| Nicotiana alata | | Solanaceae | Flowering Tobacco red |
| Nicotiana plumbaginifolia | | Solanaceae | Tex-Mex Tobacco |
| Nicotiana tabacum | | Solanaceae | Tobacco |
| Nicotiana x sanderae | | Solanaceae | Flowering Tobacco salmon |
| Nilgirianthus heyneanus | Strobilanthes heyneanus | Acanthaceae | Karun Kurinji |
| Nilgirianthus reticulatus | Strobilanthes reticulatus | Acanthaceae | Hill Conehead |
| Nothapodytes nimmoniana | Mappia foetida, Nothapodytes foetida, Stemonurus foetidus, Premna nimmoniana | Icacinaceae | Ghanera |
| Nyctanthes arbortristis | | Oleaceae | Har Singar |
| Nymphaea lotus var. pubescens/pubescens/esculenta | | Nymphaeaceae | White Water Lily |
| Nymphaea mexicana | | Nymphaeaceae | Yellow Waterlily |
| Nymphaea nouchali | Nymphaea stellata | Nymphaeaceae | Blue Water Lily |
| Nymphaea 'Panama Pacific' | | Nymphaeaceae | Tropical Water Lily |
| Nymphaea pubescens | Nymphaea lotus var. pubescens, Nymphaea edulis, Nymphaea esculenta | Nymphaeaceae | Water Lily |
| Nymphoides hydrophylla | Menyanthes hydrophylla, Nymphoides cristata, Limnanthemum cristatum | Menyanthaceae | Crested Floatingheart |
| Nymphoides indica | Nymphoides humboldtiana, Nymphoides indicum | Menyanthaceae | Water Snowflake |
| Oberonia acaulis | Iridorkis myriantha, Malaxis myriantha, Malaxis sikkimensis | Orchidaceae | Stem-Less Oberonia |
| Oberonia ensiformis | Iridorkis ensiformis, Malaxis ensiformis, Oberonia trilobata | Orchidaceae | Sword-Leaf Oberonia |
| Oberonia falconeri | | Orchidaceae | Falconer's Oberonia |
| Oberonia mucronata | Stelis mucronata, Oberonia iridifolia, Malaxis denticulata | Orchidaceae | Iris Leaf Oberonia |
| Oberonia myosurus | Dendrobium myosurus, Malaxis myosurus, Iridorkis myosurus | Orchidaceae | Mousetail Oberonia |
| Oberonia pachyrachis | Iridorkis pachyrachis, Oberonia orbicularis, Iridorkis orbicularis | Orchidaceae | Thick Spine Oberonia |
| Ochna obtusata | Ochna squarrosa | Ochnaceae | Ramdhan Champa |
| Ochna wightiana | Ochna heyneana | Ochnaceae | Mickey Mouse Plant |
| Ocimum americanum | Ocimum canum | Lamiaceae | Hoary Basil |
| Ocimum basilicum | | Lamiaceae | Basil |
| Ocimum gratissimum | Ocimum suave, Ocimum viride, Ocimum viridiflorum | Lamiaceae | Ram Tulsi |
| Ocimum tenuiflorum | Ocimum sanctum | Lamiaceae | Tulsi |
| Oclemena nemoralis | | Asteraceae | Bog Aster |
| Odontonema strictum | | Acanthaceae | Firespike |
| Oenanthe javanica | | Apiaceae | Water Dropwort |
| Oenothera biennis | | Onagraceae | Evening Primrose |
| Oenothera drummondii | Oenothera littoralis | Onagraceae | Beach Evening Primrose |
| Oenothera elata ssp. hookeri | Oenothera biennis var. hookeri, Oenothera hookeri | Onagraceae | Hooker's Evening Primrose |
| Oenothera rosea | | Onagraceae | Pink Evening Primrose |
| Olax imbricata | Olax wightiana, Ximenia olacoides | Olacaceae | South Asian Olax |
| Oldenlandia corymbosa | Hedyotis corymbosa | Rubiaceae | Diamond Flower |
| Oldenlandia herbacea | Hedyotis herbacea | Rubiaceae | Slender Oldenlandia |
| Olea dioica | | Oleaceae | Rose Sandalwood |
| Oncidium flexuosum | | Orchidaceae | Dancing Doll Orchid |
| Oncidium 'Goldiana' | | Orchidaceae | Oncidium Goldiana |
| Oncoba spinosa | | Flacourtiaceae | Fried Egg Tree |
| Onopordum acanthium | | Asteraceae | Cotton Thistle |
| Operculina turpethum | Merremia turpethum, Ipomoea turpethum | Convolvulaceae | Transparent Wood Rose |
| Ophiopogon intermedius | | Liliaceae | Himalayan Lily Turf |
| Ophiopogon jaburan 'Variegata' | | Liliaceae | Giant Lily Turf |
| Opuntia cochenillifera | Nopalea cochenillifera, Cactus cochenillifer | Cactaceae | Cochineal Cactus |
| Opuntia elatior | Opuntia nigricans | Cactaceae | Prickly Pear |
| Opuntia macrorhiza | Opuntia delicata, Opuntia ballii, Opuntia tenuispina | Cactaceae | Delicate Prickly Pear |
| Opuntia monacantha | Opuntia vulgaris | Cactaceae | Drooping Prickly Pear |
| Opuntia tomentosa | | Cactaceae | Woollyjoint Pricklypear |
| Oreocnide integrifolia | Villebrunea integrifolia | Urticaceae | Wild Rhea |
| Oreorchis foliosa var. indica | Corallorhiza indica, Oreorchis indica | Orchidaceae | Indian Oreorchis |
| Origanum vulgare | | Lamiaceae | Oregano |
| Ornithogalum thyrsoides | | Hyacinthaceae | Chincherinchee |
| Oroxylum indicum | Bignonia indica, Calosanthes indica | Bignoniaceae | Broken Bones Tree |
| Orthosiphon aristatus | Clerodendrum spicatum, Orthosiphon spiralis, Orthosiphon stamineus | Lamiaceae | Cat's Whiskers |
| Orthosiphon pallidus | | Lamiaceae | Pale Java Tea |
| Orthosiphon rubicundus | Ocimum tuberosum, Plectranthus rubicundus | Lamiaceae | Red Java Tea |
| Osbeckia cupularis | Osbeckia virgata | Melastomataceae | Cup Osbeckia |
| Osbeckia leschenaultiana | Osbeckia truncata, Osbeckia coronata | Melastomataceae | Leschenault's Osbeckia |
| Osbeckia muralis | Osbeckia truncata var. kurzii, Osbeckia zeylanica | Melastomataceae | Wall Osbeckia |
| Osbeckia nepalensis | Osbeckia speciosa | Melastomataceae | Nepal Osbeckia |
| Osbeckia reticulata | | Melastomataceae | Giant Osbeckia |
| Osbeckia stellata | | Melastomataceae | Starry Osbeckia |
| Osyris quadripartita | Osyris wightiana, Osyris arborea | Santalaceae | Wild Tea |
| Otacanthus caeruleus | | Scrophulariaceae | Amazon Blue |
| Ottelia alismoides | Stratiotes alismoides | Hydrocharitaceae | Duck Lettuce |
| Oxalis corniculata | Oxalis repens | Oxalidaceae | Creeping Wood Sorrel |
| Oxalis debilis var. corymbosa | Oxalis corymbosa | Oxalidaceae | Large-Flowered Pink Sorrel |
| Oxalis hedysaroides 'Rubra' | | Oxalidaceae | Fire Fern |
| Oxalis latifolia | | Oxalidaceae | Wood Sorrel |
| Oxalis purpurea | Oxalis variabilis | Oxalidaceae | Purple Wood Sorrel |
| Oxalis stricta | | Oxalidaceae | Yellow Wood Sorrel |
| Oxalis triangularis | Acetosella triangularis | Oxalidaceae | Purple Shamrock |
| Oxygraphis polypetala | Callianthemum endlicheri, Ranunculus polypetalus | Ranunculaceae | Himalayan Oxygraphis |
| Oxyria digyna | | Polygonaceae | Mountain Sorrel |
| Oxyspora paniculata | Arthrostemma paniculatum | Melastomataceae | Bristletips |
| Oxyspora vagans | | Melastomataceae | Wandering Oxyspora |
| Oxystelma esculentum | | Asclepiadaceae | Rosy Milkweed Vine |
| Oxytropis cachemiriana | | Fabaceae | Kashmir Locoweed |
| Oxytropis lapponica | | Fabaceae | Burr Locoweed |
| Oxytropis microphylla | Phaca microphylla, Astragalus microphyllus | Fabaceae | Small Leaved Locoweed |
| Oxytropis mollis | Oxytropis thomsonii | Fabaceae | Soft Locoweed |
| Pachypodium lamerei | | Apocynaceae | Madagascar Palm |
| Pachypodium lealii | | Apocynaceae | Bottle Tree |
| Pachystachys lutea | Justicia lutea | Acanthaceae | Golden Shrimp Plant |
| Pachystachys spicata | Justicia spicata, Pachystachys coccinea, Pachystachys riedeliana | Acanthaceae | Cardinal's Guard |
| Paederia foetida | Paederia scandens, Gentiana scandens, Paederia magnifica, Paederia tomentosa | Rubiaceae | Skunk Vine |
| Paeonia officinalis 'Rosea Plena' | | Paeoniaceae | Rose Peony |
| Pancratium longiflorum | Pancratium cambayense | Amaryllidaceae | Long Flowered Spider Lily |
| Pancratium parvum | | Amaryllidaceae | Forest Spider Lily |
| Pancratium triflorum | | Amaryllidaceae | Pankusum |
| Pandanus nepalensis | Pandanus furcatus var. indica | Pandanaceae | Nepal Screw Pine |
| Pandanus odorifer | Keura odorifera, Pandanus odoratissimus, Pandanus fascicularis | Pandanaceae | Kewda |
| Pandorea jasminoides | | Bignoniaceae | Bower Vine |
| Papaver orientale | | Papaveraceae | Oriental Poppy red |
| Papaver orientale | | Papaveraceae | Oriental Poppy white |
| Papaver rhoeas | | Papaveraceae | Common Poppy |
| Papaver somniferum | | Papaveraceae | Opium Poppy |
| Paphiopedilum hirsutissimum | | Orchidaceae | Lady's Slipper Orchid |
| Papilionanthe teres f. candida | Vanda teres f. candida | Orchidaceae | White Cylindrical Vanda |
| Papilionanthe teres | Vanda teres | Orchidaceae | Cylindrical Vanda |
| Paracalyx scariosus | Cylista scariosa | Fabaceae | Ran Ghevada |
| Paracaryopsis coelestina | Cynoglossum coelestinum, Adelocaryum coelestinum, Paracaryum coelestinum | Boraginaceae | Common Hill Borage |
| Paracaryopsis lambertiana | Paracaryum lambertianum | Boraginaceae | Lambert's Borage |
| Paracaryposis malabarica | Paracaryum malabaricum, Adelocaryum malabaricum | Boraginaceae | Malabar Hill Borage |
| Paris polyphylla | | Liliaceae | Himalayan Paris |
| Parkia biglandulosa | | Fabaceae | Badminton Ball Tree |
| Parkia timoriana | Parkia javanica, Parkia roxburghii | Fabaceae | Tree Bean |
| Parkinsonia aculeata | | Fabaceae | Jerusalem Thorn |
| Parmentiera cereifera | Parmentiera edulis, Crescentia aculeata | Bignoniaceae | Candle Tree |
| Parnassia cabulica | | Saxifragaceae | Kabul Bog Star |
| Parochetus communis | | Fabaceae | Blue Oxalis |
| Parthenium hysterophorus | | Asteraceae | Carrot Grass |
| Parthenocissus himalayana | Vitis himalayana, Psedera himalayana | Vitaceae | Himalayan Woodbine |
| Passiflora caerulea | | Passifloraceae | Blue Passion Flower |
| Passiflora coccinea | | Passifloraceae | Red Passion Flower |
| Passiflora edulis | | Passifloraceae | Passion Fruit |
| Passiflora foetida | | Passifloraceae | Love in a Mist |
| Passiflora incarnata | | Passifloraceae | Purple Passion Flower |
| Passiflora jamesonii | Tacsonia jamesonii | Passifloraceae | Pink Passion Flower |
| Passiflora suberosa | | Passifloraceae | Corky Passion Flower |
| Passiflora subpeltata | Passiflora alba | Passifloraceae | White Passion Flower |
| Passiflora vitifolia | | Passifloraceae | Perfumed Passion Flower |
| Passiflora x violacea | | Passifloraceae | Violet Passion Flower |
| Passiflora yucatanensis | | Passifloraceae | Yucatan Passion Flower |
| Paulownia tomentosa | | Scrophulariaceae | Empress Tree |
| Pavetta indica | Pavetta crassicaulis | Rubiaceae | Indian Pavetta |
| Pavonia odorata | | Malvaceae | Fragrant Swamp Mallow |
| Pavonia zeylanica | | Malvaceae | Ceylon Swamp Mallow |
| Pecteilis gigantea | Habenaria susannae, Habenaria gigantea, Orchis gigantea, Platanthera gigantea | Orchidaceae | Butterfly Orchid |
| Pecteilis triflora | Habenaria triflora, Habenaria uniflora, Pecteilis candida | Orchidaceae | Three Flowered Egret Orchid |
| Pedalium murex | | Pedaliaceae | Bara Gokhru |
| Pedicularis bicornuta | | Scrophulariaceae | Horned Lousewort |
| Pedicularis bifida | | Scrophulariaceae | Entire Leaf Lousewort |
| Pedicularis gracilis | | Scrophulariaceae | Slender Lousewort |
| Pedicularis oederi | | Scrophulariaceae | Oeder's Lousewort |
| Pedicularis rhinanthoides | | Scrophulariaceae | Rattle Lousewort |
| Pedicularis siphonantha | | Scrophulariaceae | Tube Lousewort |
| Pedilanthus tithymaloides | | Euphorbiaceae | Devil's Backbone |
| Pelargonium capitatum | | Geraniaceae | Rose Scented Geranium |
| Pelargonium rodneyanum | | Geraniaceae | Magenta Storksbill |
| Pelargonium x hortorum | | Geraniaceae | White Geranium |
| Pelargonium x hortorum | | Geraniaceae | Zonal Geranium |
| Pelatantheria insectifera | | Orchidaceae | Insect-Bearing Pelatanthera |
| Pelecyphora aselliformis | Mammillaria aselliformis, Anhalonium aselliforme, Ariocarpus aselliformis | Cactaceae | Hatchet Cactus |
| Peltophorum africanum | | Caesalpiniaceae | African Wattle |
| Peltophorum pterocarpum | | Caesalpiniaceae | Copperpod |
| Pennisetum ciliare | Cenchrus ciliaris | Poaceae | Buffel Grass |
| Pennisetum glaucum | | Poaceae | Bajra |
| Pennisetum hohenackeri | Pennisetum alopecuros, Gymnotrix cenchroides | Poaceae | Fountain Grass |
| Pennisetum setaceum | | Poaceae | Purple Fountain Grass |
| Penstemon spp. | | Scrophulariaceae | Penstemon Etna |
| Pentanema cernuum | | Asteraceae | Sonsari |
| Pentanema indicum | Inula indica, Vicoa indica | Asteraceae | Sonkadi |
| Pentapetes phoenicea | | Malvaceae | Midday Flower |
| Pentas lanceolata | | Rubiaceae | Star Cluster |
| Pentatropis capensis | Pentatropis microphylla, Asclepias microphylla, Cynanchum capense | Asclepiadaceae | Ambarvel |
| Pentatropis spiralis | Asclepias spiralis, Pentatropis cynanchoides | Asclepiadaceae | Aakari Bel |
| Peperomia caperata | | Piperaceae | Peperomia |
| Peperomia pellucida | Peperomia exigua, Peperomia translucens, Piper pellicudum | Piperaceae | Shiny Bush |
| Pereskia grandifolia | Rhodocactus grandifolius, Cactus grandifolius, Pereskia grandiflora | Cactaceae | Rose Cactus |
| Pereskiopsis diguetii | Pereskiopsis velutina, Opuntia diguetii, Pereskiopsis digueti | Cactaceae | Alfilerillo |
| Pergularia daemia | Asclepias daemia, Daemia extensa, Cynanchum extensum | Asclepiadaceae | Pergularia |
| Pericallis x hybrida | Cineraria x hybrida, Senecio x hybridus | Asteraceae | Cineraria |
| Peristrophe montana | | Acanthaceae | Mountain Peristrophe |
| Peristrophe paniculata | Dianthera paniculata, Peristrophe bicalyculata | Acanthaceae | Panicled Peristrophe |
| Peristrophe roxburghiana | Peristrophe tinctoria | Acanthaceae | Magenta Plant |
| Peristylus densus | | Orchidaceae | Peristylus Orchid |
| Peristylus elisabethae | Habenaria elisabethae, Herminium elisabethae | Orchidaceae | Elisabeth's Peristylus |
| Peristylus goodyeroides | Habenaria affinis, Habenaria goodyeroides, Herminium goodyeroides | Orchidaceae | Goodyera-Like Peristylus |
| Perotis indica | Anthoxanthum indicum, Saccharum spicatum | Poaceae | Indian Comet Grass |
| Persea duthiei | | Lauraceae | Duthie's Bay Tree |
| Persea odoratissima | Machilus odoratissimus | Lauraceae | Fragrant Bay Tree |
| Persicaria capitata | Polygonum capitatum | Polygonaceae | Pink Knotweed |
| Persicaria chinensis | Polygonum chinense, Polygonum auriculata | Polygonaceae | Chinese Knotweed |
| Persicaria glabra | Polygonum glabrum | Polygonaceae | Denseflower Knotweed |
| Persicaria nepalensis | Polygonum nepalense | Polygonaceae | Nepal Knotweed |
| Persicaria wallichii | Polygonum polystachyum | Polygonaceae | Himalayan Knotweed |
| Petalidium barlerioides | Ruellia bracteata | Acanthaceae | Nail Dye |
| Petiveria alliacea | Mapa graveolens, Petiveria corrientina, Petiveria foetida, Petiveria graveolens | Phytolaccaceae | Guinea Henweed |
| Petrea volubilis | | Verbenaceae | Purple Wreath |
| Petunia hybrida | | Solanaceae | Petunia |
| Petunia violacea | | Solanaceae | Violet Petunia |
| Peucedanum grande | | Apiaceae | Wild Carrot |
| Phaius mishmensis | Limatodis mishmensis, Phaius cupreus, Calanthe crinita | Orchidaceae | Mishmi Hills Phaius |
| Phaius tankervilleae | Phaius tankervilliae | Orchidaceae | Nun's Orchid |
| Phalaenopsis amabilis | | Orchidaceae | Moon Orchid |
| Phalaenopsis cornu-cervi | Polychilos cornu-cervi, Polystylus cornu-cervi, Phalaenopsis devriesiana | Orchidaceae | Deer Horn Phalaenopsis |
| Phalaenopsis spp. | | Orchidaceae | Moth Orchid hybrid |
| Phalaris minor | | Poaceae | Dwarf Canary Grass |
| Phaseolus vulgaris | Phaseolus communis, Phaseolus nanus | Fabaceae | Common Bean |
| Philadelphus tomentosus | Philadelphus coronarius | Hydrangeaceae | Mock Orange |
| Phlogacanthus pubinervius | | Acanthaceae | Red Nongmangkha |
| Phlogacanthus thyrsiformis | Phlogacanthus thyrsiflorus, Justicia thyrsiformis, Justicia thyrsiflora | Acanthaceae | Nongmangkha |
| Phlomis bracteosa | | Lamiaceae | Purple Jerusalem Sage |
| Phlomis spectabilis | | Lamiaceae | Showy Jerusalem Sage |
| Phlox drummondii | | Polemoniaceae | Phlox Twinkle |
| Phlox paniculata | | Polemoniaceae | Garden Phlox |
| Phlox subulata | | Polemoniaceae | Creeping Phlox |
| Phoenix loureirii var. humilis | Phoenix humilis | Arecaceae | Dwarf Date Palm |
| Phoenix roebelenii | | Arecaceae | Pygmy Date Palm |
| Phoenix rupicola | | Arecaceae | Cliff Date Palm |
| Phoenix sylvestris | Elate sylvestris | Arecaceae | Wild Date Palm |
| Pholidota articulata | | Orchidaceae | Jointed Pholidota |
| Phyla nodiflora | | Verbenaceae | Frog Fruit |
| Phyllanthus acidus | | Phyllanthaceae | Star Gooseberry |
| Phyllanthus amarus | Phyllanthus niruri | Phyllanthaceae | Carry Me Seed |
| Phyllanthus emblica | Emblica officinalis | Phyllanthaceae | Amla |
| Phyllanthus fraternus | Phyllanthus niruri, Phyllanthus niruri var. scabrellus | Phyllanthaceae | Gulf Leaf-Flower |
| Phyllanthus lawii | | Phyllanthaceae | Law's Gooseberry |
| Phyllanthus maderaspatensis | Phyllanthus maderaspatanus | Phyllanthaceae | Madras Leaf-Flower |
| Phyllanthus myrtifolius | | Phyllanthaceae | Mousetail Plant |
| Phyllanthus reticulatus | Kirganelia reticulata, Anisonema reticulatum, Cicca reticulata, Diasperus reticulatus | Phyllanthaceae | Black-Honey Shrub |
| Phyllanthus tenellus | Phyllanthus corcovadensis | Phyllanthaceae | Long Stalked Leaf-Flower |
| Phyllanthus urinaria | Phyllanthus leprocarpus | Phyllanthaceae | Chamber Bitter |
| Phyllanthus virgatus | Phyllanthus simplex | Phyllanthaceae | Seed Under Leaf |
| Phyllocephalum scabridum | Decaneurum scabridum | Asteraceae | Purple Heads |
| Phyllodium pulchellum | Hedysarum pulchellum, Desmodium pulchellum, Meibomia pulchella | Fabaceae | Showy Desmodium |
| Physalis joe-diasii | | Solanaceae | Joe Dias's Ground Cherry |
| Physalis minima | | Solanaceae | Ground Cherry |
| Physalis peruviana | | Solanaceae | Cape Gooseberry |
| Phytolacca acinosa | | Phytolaccaceae | Indian Pokeweed |
| Phytolacca octandra | Phytolacca icosandra | Phytolaccaceae | Tropical Pokeweed |
| Pieris formosa | | Ericaceae | Himalayan Pieris |
| Pilea cadierei | | Urticaceae | Aluminium Plant |
| Pilea scripta | Pilea nepalensis | Urticaceae | Himalayan Clearweed |
| Pilea umbrosa | | Urticaceae | Shady Himalayan Clearweed |
| Pimpinella tomentosa | Heracleum tomentosam | Apiaceae | Hairy Hogweed |
| Pinda concanensis | Heracleum pinda | Apiaceae | Konkan Pinda |
| Pinus gerardiana | Pinus gerardii | Pinaceae | Chilghoza Pine |
| Pinus roxburghii | Pinus longifolia | Pinaceae | Chir Pine |
| Pinus wallichiana | Pinus excelsa, Pinus griffithii | Pinaceae | Himalayan Blue Pine |
| Piper cubeba | | Piperaceae | Tailed Pepper |
| Piper longum | | Piperaceae | Long Pepper |
| Piper nigrum | | Piperaceae | Black Pepper |
| Piptanthus nepalensis | Baptisia nepalensis, Piptanthus bicolor, Thermopsis laburnifolia | Fabaceae | Evergreen Laburnum |
| Pistacia chinensis ssp. Integerrima | Pistacia integerrima, Rhus integerrima | Anacardiaceae | Kakkar |
| Pistia stratiotes | | Araceae | Water Cabbage |
| Pisum sativum | | Fabaceae | Pea |
| Pithecellobium dulce | | Mimosaceae | Madras Thorn |
| Plantaginorchis plantaginea | Habenaria plantaginea | Orchidaceae | Plantain Orchid |
| Plantago asiatica | | Plantaginaceae | Asian Plantain |
| Plantago coronopus | | Plantaginaceae | Buck Horn Plantain |
| Plantago major | | Plantaginaceae | Broad Leaf Plantain |
| Platanus orientalis | | Platanaceae | Chinar |
| Platycladus orientalis | Thuja orientalis, Biota orientalis | Cupressaceae | Morpankhi |
| Plectranthus amboinicus | Coleus amboinicus, Coleus aromaticus, Plectranthus aromaticus | Lamiaceae | Cuban Oregano |
| Plectranthus prostratus | | Lamiaceae | Succulent Swedish Ivy |
| Pleiospilos spp. | | Aizoaceae | Mimicry Mesemb |
| Pleocaulus ritchiei | Strobilanthes sessilis, Strobilanthes sessilis var. ritchiei | Acanthaceae | Mal Karvy |
| Pluchea lanceolata | Berthelotia lanceolata | Asteraceae | Rasna |
| Pluchea ovalis | Pluchea tomentosa, Baccharis ovalis, Baccharis ovata | Asteraceae | Woolly Camphor-Weed |
| Plumbago auriculata | Plumbago capensis | Plumbaginaceae | Nila Chitrak |
| Plumbago indica | Plumbago rosea, Thela coccinea | Plumbaginaceae | Lal Chitrak |
| Plumbago zeylanica | | Plumbaginaceae | Chitrak |
| Plumeria alba | | Apocynaceae | White Frangipani |
| Plumeria obtusa | | Apocynaceae | Singapore Frangipani |
| Plumeria pudica | | Apocynaceae | Wild Plumeria |
| Plumeria rubra acutifolia | | Apocynaceae | Common White Frangipani |
| Plumeria rubra | | Apocynaceae | Frangipani pink |
| Plumeria rubra | | Apocynaceae | Frangipani red |
| Poa annua | | Poaceae | Annual Bluegrass |
| Podocarpus chinensis | | Podocarpaceae | Chinese Podocarp |
| Podophyllum hexandrum | Podophyllum emodi | Berberidaceae | Himalayan May Apple |
| Podranea brycei | Pandorea brycei, Tecoma brycei | Bignoniaceae | Zimbabwe Creeper |
| Pogostemon benghalensis | Origanum benghalense, Pogostemon parviflorus, Pogostemon plectranthoides | Lamiaceae | Bengal Pogostemon |
| Pogostemon deccanensis | Dysophylla stellata | Lamiaceae | Jambhli Manjiri |
| Pogostemon purpurascens | | Lamiaceae | Sangbrei |
| Polemonium caeruleum subsp. himalayanum | Polemonium himalaicum | Polemoniaceae | Himalayan Jacob's Ladder |
| Polianthes tuberosa | | Agavaceae | Rajanigandha |
| Polyalthia longifolia | | Annonaceae | Ashok |
| Polycarpaea corymbosa | Achyranthes corymbosa, Polycarpaea nebulosa | Caryophyllaceae | Oldman's Cap |
| Polygala arvensis | Polygala chinensis, Polygala brachystachya, Polygala procumbens | Polygalaceae | Field Milkwort |
| Polygala elongata | | Polygalaceae | Narrow-Leaved Milkwort |
| Polygala persicariifolia | | Polygalaceae | Knotweed Leaved Milkwort |
| Polygonatum cirrhifolium | | Liliaceae | Coiling Leaf Solomon Seal |
| Polygonatum spp. | | Liliaceae | Solomon Seal |
| Polygonatum verticillatum | | Liliaceae | Whorled Solomon's Seal |
| Polygonum orientale | Persicaria orientalis | Polygonaceae | Oriental Pepper |
| Polygonum plebeium | Polygonum plebejum | Polygonaceae | Small Knotweed |
| Polygonum runcinatum | Persicaria runcinata | Polygonaceae | Lobed Leaf Knotweed |
| Polypogon monspeliensis | Alopecurus monspeliensis | Poaceae | Annual Beard Grass |
| Polyscias scutellaria | | Araliaceae | Shield Aralia |
| Pontederia cordata | | Pontederiaceae | Pickerel Weed |
| Populus ciliata | | Salicaceae | Himalayan Poplar |
| Portulaca grandiflora | | Portulacaceae | Moss Rose |
| Portulaca oleracea | | Portulacaceae | Purslane |
| Portulaca pilosa | | Portulacaceae | Kiss Me Quick |
| Portulaca quadrifida | | Portulacaceae | Chicken Weed |
| Portulaca spp. | | Portulacaceae | Portulaca All Aglow |
| Portulaca umbraticola | | Portulacaceae | Wingpod Purslane |
| Posoqueria longiflora | | Rubiaceae | Needle Flower Tree |
| Potamogeton nodosus | Potamogeton americanus | Potamogetonaceae | Long Leaf Pondweed |
| Potentilla atrosanguinea | | Rosaceae | Himalayan Cinquefoil |
| Potentilla cuneata | | Rosaceae | Five Finger Cinquefoil |
| Potentilla nepalensis | | Rosaceae | Nepal Cinquefoil |
| Potentilla polyphylla | Potentilla mooniana | Rosaceae | Many Leaved Cinquefoil |
| Potentilla supina | Comarum flavum | Rosaceae | Spreading Cinquefoil |
| Pouzolzia zeylanica | Pouzolzia indica, Parietaria zeylanica | Urticaceae | Graceful Pouzolz's Bush |
| Pratia nummularia | Pratia begoniifolia, Lobelia begoniifolia | Campanulaceae | Roundleaf Star Creeper |
| Prenanthes brunoniana | Cicerbita brunoniana, Lactuca brunoniana, Prenanthes hispidula | Asteraceae | Himalayan Rattlesnake Root |
| Primula acaulis | | Primulaceae | Primrose Fantastica Violet |
| Primula capitata | | Primulaceae | Asiatic Primrose |
| Primula denticulata | Primula aequalis, Primula elata, Primula telemachica | Primulaceae | Drumstick Primrose |
| Primula floribunda | | Primulaceae | Buttercup Primrose |
| Primula glomerata | | Primulaceae | Globe Primrose |
| Primula involucrata | Primula munroi | Primulaceae | Tall Pale Primrose |
| Primula macrophylla | | Primulaceae | Large Leaf Primrose |
| Primula malacoides | | Primulaceae | Fairy Primrose |
| Primula obconica | | Primulaceae | German Primrose purple |
| Primula obconica | | Primulaceae | German Primrose white |
| Primula reidii | | Primulaceae | Reid's Primrose |
| Primula reptans | Primula stracheyi | Primulaceae | Creeping Primrose |
| Primula rosea | | Primulaceae | Himalayan Meadow Primrose |
| Primula sikkimensis | | Primulaceae | Himalayan Cowslip |
| Primula spp. 'Dreambird' | | Primulaceae | Primrose Dreambird |
| Prinsepia utilis | | Rosaceae | Himalayan Cherry Prinsepia |
| Pritchardia hillebrandii | | Arecaceae | Loulu Palm |
| Priva cordifolia | Buchnera cordifolia, Priva abyssinica, Priva leptostachya | Verbenaceae | Heart-Leaf Velvet Bur |
| Proiphys amboinensis | Eurycles amboinensis, Eurycles sylvestris | Amaryllidaceae | Cardwell Lily |
| Prosopis cineraria | | Fabaceae | Jhand |
| Prosopis juliflora | | Fabaceae | Algaroba |
| Prunella vulgaris var. vulgaris | | Lamiaceae | Common Self-Heal |
| Prunus cerasoides | Cerasus puddum, Prunus puddum, Prunus majestica | Rosaceae | Wild Himalayan Cherry |
| Prunus cornuta | Padus cornuta, Cerasus cornuta | Rosaceae | Himalayan Bird Cherry |
| Prunus domestica | | Rosaceae | Plum |
| Prunus persica | | Rosaceae | Peach |
| Pseudarthria viscida | Hedysarum viscidum | Fabaceae | Salaparni |
| Pseuderanthemum carruthersii | | Acanthaceae | Purple False Eranthemum |
| Pseuderanthemum laxiflorum | | Acanthaceae | Shooting Star |
| Pseuderanthemum reticulatum | | Acanthaceae | Yellow-Vein Eranthemum |
| Pseuderanthemum variabile | | Acanthaceae | Pastel Flower |
| Pseudobombax ellipticum | Bombax ellipticum | Bombacaceae | Shaving Brush Tree |
| Pseudobombax ellipticum var. alba | | Bombacaceae | White Shaving Brush Tree |
| Pseudognaphalium hypoleucum | Gnaphalium hypoleucum | Asteraceae | White Leaved Cudweed |
| Psidium cattleianum | | Myrtaceae | Chinese Guava |
| Psidium guajava | | Myrtaceae | Guava |
| Psidium guajava | | Myrtaceae | Red Malaysian Guava |
| Psophocarpus tetragonolobus | | Fabaceae | Goa Bean |
| Psychotria flavida | | Rubiaceae | South Indian Wild Coffee |
| Psydrax umbellata | Canthium umbellatum, Canthium umbellulatum, Plectronia umbellata | Rubiaceae | Umbelled Canthium |
| Psylliostachys suworowii | Limonium suworowii, Statice suworowii | Plumbaginaceae | Russian Statice |
| Pterocarpus indicus f. echinatus | Pterocarpus echinatus, Pterocarpus vidalianus | Fabaceae | Prickly Padauk |
| Pterolobium hexapetalum | Reichardia hexapetala | Caesalpiniaceae | Indian Redwing |
| Pterospermum acerifolium | | Sterculiaceae | Kanak Champa |
| Pterygota alata | Sterculia alata | Sterculiaceae | Buddha Coconut |
| Pueraria phaseoloides | Dolichos phaseoloides, Neustanthus phaseoloides | Fabaceae | Tropical Kudzu |
| Pueraria tuberosa | | Fabaceae | Indian Kudzu |
| Pulicaria wightiana | | Asteraceae | Sontikli |
| Punica granatum | | Punicaceae | Pomegranate |
| Pupalia lappacea | Achyranthes lappacea | Amaranthaceae | Forest Burr |
| Putranjiva roxburghii | Drypetes roxburghii, Nageia putranjiva | Putranjivaceae | Putranjiva |
| Pyrostegia venusta | Bignonia ignea, Bignonia venusta, Pyrostegia ignea | Bignoniaceae | Flaming Trumpet |
| Pyrus calleryana | | Rosaceae | Ornamental Pear |
| Pyrus communis | | Rosaceae | Pear |
| Quassia amara | | Simaroubaceae | Bitter Quassia |
| Quercus glauca | Quercus annulata | Fagaceae | Glaucous Oak |
| Quercus leucotrichophora | Quercus incana | Fagaceae | Blackjack Oak |
| Quirivelia frutescens | Apocynum frutescens, Echites frutescens, Ichnocarpus frutescens | Apocynaceae | Black Creeper |
| Quisqualis indica | | Combretaceae | Rangoon Creeper |
| Radermachera xylocarpa | Bignonia xylocarpa, Stereospermum xylocarpum | Bignoniaceae | Padri Tree |
| Ranunculus asiaticus | | Ranunculaceae | Persian Buttercup |
| Ranunculus diffusus | | Ranunculaceae | Spreading Buttercup |
| Ranunculus laetus | | Ranunculaceae | Cheerful Buttercup |
| Raphanus sativus | | Brassicaceae | Radish |
| Rauvolfia micrantha | Ophioxylon micranthum | Apocynaceae | Small Flowered Snake Root |
| Rauvolfia serpentina | Rauwolfia serpentina | Apocynaceae | Sarpagandha |
| Rauvolfia tetraphylla | Rauvolfia canescens, Rauvolfia heterophylla, Rauvolfia hirsuta | Apocynaceae | Wild Snake Root |
| Ravenala madagascariensis | | Strelitziaceae | Traveler's Palm |
| Ravenia spectabilis | Lemonia spectabilis/ Limonia spectabilis | Rutaceae | Lemonia |
| Reinwardtia cicanoba | Reinwardtia tetragyna | Linaceae | Yellow Himalayan Flax |
| Reinwardtia indica | Reinwardtia trigyna, Linum trigynum, Linum repens | Linaceae | Yellow Flax |
| Renanthera imschootiana | | Orchidaceae | Red Vanda |
| Reutealis trisperma | Aleurites trisperma | Euphorbiaceae | Philippine Tung Tree |
| Rhamphicarpa longiflora | | Scrophulariaceae | Tutari |
| Rhaphidophora decursiva | Raphidophora decursiva | Araceae | Creeping Philodendron |
| Rheum acuminatum | Rheum orientalixizangense | Polygonaceae | Ornamental Rhubarb |
| Rheum australe | Rheum emodi | Polygonaceae | Himalayan Rhubarb |
| Rheum nobile | | Polygonaceae | Sikkim Rhubarb |
| Rheum spiciforme | | Polygonaceae | Spiked Rhubarb |
| Rheum webbianum | | Polygonaceae | Indian Rhubarb |
| Rhinacanthus nasutus | Rhinacanthus nasuta, Justicia nasuta, Rhinacanthus communis | Acanthaceae | Snake Jasmine |
| Rhodanthe chlorocephala subsp. rosea | Helipterum roseum, Acroclinium roseum | Asteraceae | Rosy Everlasting |
| Rhodiola fastigiata | Sedum fastigiatum, Sedum quadrifidum var. fastigiatum, Rhodiola coccinea | Crassulaceae | Clustered Rhodiola |
| Rhodiola heterodonta | | Crassulaceae | Toothed Rhodiola |
| Rhodiola himalensis | Chamaerhodiola himalensis | Crassulaceae | Himalayan Rhodiola |
| Rhodiola trifida | Sedum trifidum | Crassulaceae | Trifid Sedum |
| Rhodiola wallichiana | | Crassulaceae | Wallich's Rhodiola |
| Rhododendron anthopogon | | Ericaceae | Dwarf Rhododendron |
| Rhododendron arboreum | | Ericaceae | Tree Rhododendron |
| Rhododendron campanulatum | | Ericaceae | Bell Rhododendron |
| Rhododendron ciliatum | | Ericaceae | Fringed Leaf Rhododendron |
| Rhododendron cinnabarinum | | Ericaceae | Cinnabar Rhododendron |
| Rhododendron decipiens | | Ericaceae | Deceptive Rhododendron |
| Rhododendron fulgens | | Ericaceae | Shining Rhododendron |
| Rhododendron hodgsonii | | Ericaceae | Hodgson's Rhododendron |
| Rhododendron indicum | Azalea indica | Ericaceae | Azalea |
| Rhododendron lepidotum ssp. salignum | Rhododendron salignum | Ericaceae | Yellow Scaly Rhododendron |
| Rhododendron lepidotum | | Ericaceae | Pink Scaly Rhododendron |
| Rhododendron lindleyi | Rhododendron bhotanicum | Ericaceae | Maddenia Rhododendron |
| Rhododendron thomsonii | | Ericaceae | Thomson's Rhododendron |
| Rhododendron wallichii | | Ericaceae | Wallich's Rhododendron |
| Rhododendron wightii | | Ericaceae | Wight's Rhododendron |
| Rhus mysorensis | | Anacardiaceae | Mysore Sumac |
| Rhynchoglossum lazulinum | | Gesneriaceae | Arunachal Rhynchoglossum |
| Rhynchoglossum notonianum | Klugia notoniana, Wulfenia notoniana | Gesneriaceae | East Indian Klugia |
| Rhynchoglossum obliquum | Loxotis obliqua, Rhynchoglossum obliquum var. parviflora | Gesneriaceae | Small Flowered Rhynchoglossum |
| Rhynchosia hirta | Rhynchosia cyanosperma /albiflora | Fabaceae | Hairy Snoutbean |
| Rhynchosia minima | Dolicholus minimus, Dolichos minimus | Fabaceae | Burn-Mouth Vine |
| Rhynchospora wightiana | Haplostylis wightianus, Rhynchospora discolor | Cyperaceae | Wight's Beak-Sedge |
| Rhynchostylis retusa | | Orchidaceae | Foxtail Orchid |
| Ribes himalense | Ribes rubrum, Ribes emodense | Saxifragaceae | Himalayan Currant |
| Richardia scabra | Richardsonia scabra | Rubiaceae | Rough Mexican Clover |
| Ricinus communis | | Euphorbiaceae | Castor Bean Plant |
| Rivea hypocrateriformis | | Convolvulaceae | Midnapore Creeper |
| Rivina humilis | Rivina laevis | Phytolaccaceae | Blood Berry |
| Robinia pseudoacacia | | Fabaceae | White Locust Tree |
| Rondeletia odorata | | Rubiaceae | Fragrant Panama Rose |
| Rosa brunonii | | Rosaceae | Himalayan Musk Rose |
| Rosa chinensis 'Viridiflora' | | Rosaceae | Green Rose |
| Rosa gigantea macrocarpa | | Rosaceae | Manipur Wild-Tea Rose |
| Rosa 'Happy Wanderer' | | Rosaceae | Rose Happy Wanderer |
| Rosa macrophylla | | Rosaceae | Himalayan Rose |
| Rosa multiflora var. carnea | | Rosaceae | Pink Multiflora Rose |
| Rosa sericea | Rosa tetrapetala, Rosa wallichii, Rosa polyphylla, Rosa omiensis | Rosaceae | Silky Rose |
| Rosa 'Summer Snow' | | Rosaceae | Rose Summer Snow |
| Rosa | | Rosaceae | Mini Rose |
| Rosa | | Rosaceae | Rose |
| Rosa webbiana | | Rosaceae | Webb's Rose |
| Rosa x damascena | | Rosaceae | Damask Rose |
| Rosa 'Yellow Doll' | | Rosaceae | Yellow Doll Rose |
| Roscoea alpina | | Zingiberaceae | Mountain Roscoe Lily |
| Roscoea auriculata | | Zingiberaceae | Roscoe's Lily white |
| Roscoea purpurea | | Zingiberaceae | Roscoe's Lily purple |
| Rostellularia crinita | Justicia micrantha | Acanthaceae | Small Flowered Justicia |
| Rotala fimbriata | Ammannia pentandra var. fimbriata | Lythraceae | Fringed Flower Rotala |
| Rotala macrandra | | Lythraceae | Giant Red Rotala |
| Rotala rotundifolia | Ammannia rotundifolia | Lythraceae | Roundleaf Toothcup |
| Rotala tenuis | Ammania tenuis, Micranthus serpyllifolia, Rotala serpyllifolia | Lythraceae | Slender Rotala |
| Rotula aquatica | Carmona viminea, Ehretia viminea, Rhabdia viminea | Boraginaceae | Aquatic Rotula |
| Roystonea regia | | Arecaceae | Royal Palm |
| Rubia cordifolia | Galium cordifolium | Rubiaceae | Indian Madder |
| Rubus ellipticus | Rubus rotundifolius | Rosaceae | Yellow Himalayan Raspberry |
| Rubus hoffmeisterianus | | Rosaceae | Hoffmeister Raspberry |
| Rubus moluccanus | Rubus hillii | Rosaceae | Wild Raspberry |
| Rubus rosifolius var. coronarius | Rubus rosaefolius | Rosaceae | Roseleaf Raspberry |
| Rudbeckia hirta | | Asteraceae | Black-Eyed Susan |
| Rudbeckia laciniata 'Goldquelle' | | | Coneflower |
| Ruellia brittoniana | | Acanthaceae | Desert Petunia |
| Ruellia elegans | | Acanthaceae | Red Ruellia |
| Ruellia nudiflora | | Acanthaceae | Violet Wild Petunia |
| Ruellia strepens | Dipteracanthus micranthus, Dipteracanthus strepens | Acanthaceae | Limestone Ruellia |
| Ruellia tuberosa | | Acanthaceae | Minnie Root |
| Rumex hastatus | | Polygonaceae | Arrowleaf Dock |
| Rumex nepalensis | | Polygonaceae | Nepal Dock |
| Rumex patientia | Rumex orientalis | Polygonaceae | Patience Dock |
| Rumex vesicarius | Acetosa vesicaria | Polygonaceae | Bladder Dock |
| Rungia parviflora | Justicia parviflora, Rungia polygonoides | Acanthaceae | Small Flowered Rungia |
| Rungia pectinata | R. parviflora var. pectinata, R. parviflora var. muralis, Justicia pectinata | Acanthaceae | Comb Rungia |
| Rungia repens | | Acanthaceae | Creeping Rungia |
| Ruscus hypoglossum | | Ruscaceae | Spineless Butcher's Broom |
| Russelia equisetiformis | | Scrophulariaceae | Coral Plant |
| Ruta graveolens | | Rutaceae | Rue |
| Ruttya fruticosa | | Acanthaceae | Rabbit Ears |
| Sabal palmetto | | Arecaceae | Cabbage Palm |
| Saccharum officinarum | | Poaceae | Sugarcane |
| Saccharum spontaneum | | Poaceae | Kans Grass |
| Sagittaria sagittifolia | Sagittaria aquatica | Alismataceae | Arrowhead |
| Saintpaulia rupicola | | Gesneriaceae | African Violet white |
| Saintpaulia spp. | | Gesneriaceae | African Violet |
| Salacia chinensis | Salacia prinoides | Celastraceae | Chinese Salacia |
| Salix babylonica | | Salicaceae | Weeping Willow |
| Salix calyculata | | Salicaceae | Small Sepal Willow |
| Salix tetrasperma | | Salicaceae | Indian Willow |
| Salvadora oleoides | | Salvadoraceae | Bada Peelu |
| Salvadora persica | | Salvadoraceae | Toothbrush Tree |
| Salvia farinacea | | Lamiaceae | Mealy Blue Sage |
| Salvia fulgen | | Lamiaceae | Cardinal Sage |
| Salvia hians | | Lamiaceae | Himalayan Blue Sage |
| Salvia lanata | | Lamiaceae | Woolly Sage |
| Salvia leucantha | | Lamiaceae | Mexican Bush Sage |
| Salvia nemorosa | | Lamiaceae | Violet Sage |
| Salvia nubicola | | Lamiaceae | Himalayan Yellow Sage |
| Salvia splendens | | Lamiaceae | Scarlet Sage |
| Salvia splendens | | Lamiaceae | White Salvia |
| Samanea saman | | Fabaceae | Rain Tree |
| Sambucus canadensis | | Caprifoliaceae | American Elder |
| Sanchezia speciosa | | Acanthaceae | Shrubby Whitevein |
| Sansevieria cylindrica | | Ruscaceae | Spear Sansevieria |
| Sansevieria parva | | Ruscaceae | Kenya Hyacinth |
| Sansevieria trifasciata | | Ruscaceae | Snake Plant |
| Santalum album | | Santalaceae | Sandalwood |
| Sapindus emarginatus | | Sapindaceae | Notched Leaf Soapnut |
| Sapindus mukorossi | Sapindus detergens, Sapindus utilis | Sapindaceae | Reetha |
| Sapindus trifoliatus | Sapindus laurifolius | Sapindaceae | South India Soapnut |
| Sapium insigne | Carumbium insigne, Excoecaria insignis | Euphorbiaceae | Tiger's Milk Spruce |
| Sapria himalayana | | Rafflesiaceae | Himalayan Sapria |
| Saraca indica/Jonesia asoka | | Caesalpiniaceae | Sita Ashok |
| Saraca thaipingensis | | Caesalpiniaceae | Yellow Ashok |
| Sarcococca saligna | Buxus saligna, Sarcococca pruniformis var. angustifolia | Buxaceae | Willow-Leaf Sweet-Box |
| Saritaea magnifica | Bignonia magnifica, Arrabidaea magnifica | Bignoniaceae | Glow Vine |
| Satyrium nepalense | | Orchidaceae | Nepal Satyrium |
| Saurauia roxburghii | | Actinidiaceae | Singkrang |
| Sauromatum venosum | Arum pedatum, Arum venosum, Sauromatum pedatum | Araceae | Voodoo Lily |
| Saussurea auriculata | | Asteraceae | Kut |
| Saussurea costus | Aucklandia costus, Aplotaxis lappa, Saussurea lappa | Asteraceae | Costus |
| Saussurea fastuosa | Saussurea denticulata, Aplotaxis denticulata | Asteraceae | Proud Saw-wort |
| Saussurea gossypiphora | | Asteraceae | Kasturi Kamal |
| Saussurea graminifolia | | Asteraceae | Grass Leaved Saw-wort |
| Saussurea nepalensis | | Asteraceae | Nepal Saw-wort |
| Saussurea obvallata | | Asteraceae | Brahma Kamal |
| Saussurea piptathera | | Asteraceae | Himalayan Saw-wort |
| Saussurea simpsoniana | | Asteraceae | Phen Kamal |
| Saussurea tridactyla | | Asteraceae | Snow Lotus |
| Saxifraga brunonis | | Saxifragaceae | Brown's Saxifrage |
| Saxifraga caveana | | Saxifragaceae | Glandular Saxifrage |
| Saxifraga pallida | | Saxifragaceae | Yellow Spotted White Saxifrage |
| Saxifraga parnassifolia | | Saxifragaceae | Himalayan Saxifrage |
| Saxifraga stolonifera | | Saxifragaceae | Strawberry Begonia |
| Scadoxus multiflorus ssp. multiflorus | Haemanthus multiflorus | Amaryllidaceae | Blood Lily |
| Scaevola taccada | Lobelia taccada, Scaevola frutescens, Scaevola sericea | Goodeniaceae | Half Flower |
| Schefflera actinophylla | Brassaia actinophylla | Araliaceae | Octopus Tree |
| Schima wallichii | | Theaceae | Schima |
| Schinus terebinthifolius | | Anacardiaceae | Brazilian Pepper |
| Schizanthus pinnatus | | Solanaceae | Butterfly Flower |
| Schleichera oleosa | | Sapindaceae | Kusum Tree |
| Schlumbergera truncata | | Cactaceae | Crab Cactus |
| Schrebera swietenioides | | Oleaceae | Weaver's Beam Tree |
| Scoparia dulcis | | Scrophulariaceae | Sweet Broom Weed |
| Scrophularia elatior | | Scrophulariaceae | Himalayan Figwort |
| Scurrula elata | Loranthus elatus | Loranthaceae | Tall Mistletoe |
| Scutellaria discolor | Scutellaria indica | Lamiaceae | Bicolor Skullcap |
| Scutellaria scandens | Scutellaria angulosa | Lamiaceae | Climbing Skullcap |
| Scutia myrtina | Rhammus myrtinus, Scutia indica, Scutia circumscissa | Rhamnaceae | Cat Thorn |
| Sechium edule | | Cucurbitaceae | Chaco |
| Sedum album | | Crassulaceae | White Stonecrop |
| Sedum ewersii | | Crassulaceae | Pink Sedum |
| Sedum morganianum | | Crassulaceae | Donkey Tail |
| Sedum oreades | | Crassulaceae | Mountain Sedum |
| Sedum pachyphyllum | | Crassulaceae | Stonecrop |
| Sedum sexangulare | | Crassulaceae | Tasteless Stonecrop |
| Sedum spectabile | | Crassulaceae | Showy Sedum |
| Selinum wallichianum | Selinum tenuifolium, Peucedanum wallichianum | Apiaceae | Milk Parsley |
| Semecarpus anacardium | Anacardium orientale | Anacardiaceae | Marking Nut |
| Senecio bombayensis | | Asteraceae | Sonki |
| Senecio confusus | | Asteraceae | Mexican Flame Vine |
| Senecio graciliflorus | | Asteraceae | Graceful Senecio |
| Senecio pendulus | Kleinia pendula | Asteraceae | Inch Worm |
| Senecoi jacquemontianus | | Asteraceae | Jacquemont's Senecio |
| Senna alata | Cassia alata | Caesalpiniaceae | Candle Bush |
| Senna auriculata | Cassia auriculata | Caesalpiniaceae | Tanner's Cassia |
| Senna didymobotrya | Cassia didymobotrya, Cassia nairobensis | Caesalpiniaceae | Popcorn Cassia |
| Senna hirsuta var. hirsuta | Cassia hirsuta | Caesalpiniaceae | Woolly Cassia |
| Senna polyphylla | Cassia polyphylla | Caesalpiniaceae | Desert Cassia |
| Senna siamea | Cassia siamea | Caesalpiniaceae | Siamese Cassia |
| Senna sophera | Cassia sophera, Cassia torosa | Caesalpiniaceae | Sophera Senna |
| Senna spectabilis | Cassia spectabilis, Cassia excelsa, Cassia carnaval | Caesalpiniaceae | Spectacular Cassia |
| Senna surattensis | Cassia surattensis | Caesalpiniaceae | Glaucous Cassia |
| Senna tora | Cassia tora | Caesalpiniaceae | Stinking Cassia |
| Serissa foetida 'Flore Pleno' | Serissa japonica, Lycium japonicum, Lycium foetidum | Rubiaceae | Snow Rose double |
| Serissa foetida 'Variegata' | Serissa japonica, Lycium japonicum, Lycium foetidum | Rubiaceae | Snow Rose |
| Serissa foetida 'Variegated Pink' | Serissa japonica | Rubiaceae | Pink Snow Rose |
| Sesamum indicum | Sesamum orientale, Sesamum mulayanum | Pedaliaceae | Sesame |
| Sesamum laciniatum | | Pedaliaceae | Indian Sesame Oil Plant |
| Sesbania bispinosa | Sesbania aculeata, Aeschynomene aculeata | Fabaceae | Prickly Sesban |
| Sesbania grandiflora | Sesban coccinea, Agati grandiflora, Coronilla grandiflora | Fabaceae | Agati |
| Sesbania punicea | | Fabaceae | Rattlebox |
| Sesbania sesban | | Fabaceae | Common Sesban |
| Sesuvium portulacastrum | Portulaca portulacastrum | Aizoaceae | Sea Purslane |
| Setaria pumila ssp. pumila | Panicum pumilum, Setaria glauca, Chaetochloa lutescens | Poaceae | Yellow Foxtail |
| Setaria verticillata | Panicum verticillatum, Pennisetum verticillatum | Poaceae | Bristly Foxtail |
| Shorea robusta | | Dipterocarpaceae | Sal |
| Sibbaldia cuneata | Potentilla sibbaldi, Sibbaldia parviflora | Rosaceae | Wedge Leaf Sibbaldia |
| Sibbaldia purpurea | Potentilla purpurea | Rosaceae | Purple Glow Wort |
| Sida acuta | Sida carpinifolia | Malvaceae | Common Wireweed |
| Sida cordata | Melochia cordata, Sida humilis, Sida veronicifolia | Malvaceae | Heart-Leaf Sida |
| Sida rhombifolia | | Malvaceae | Jelly Leaf |
| Sida spinosa | | Malvaceae | Prickly Fan-Petals |
| Sigesbeckia orientalis | Siegesbeckia orientalis, Minyranthes heterophylla | Asteraceae | St Paul's Wort |
| Silene armeria | | Caryophyllaceae | None-so-Pretty |
| Silene elizabethae | | Caryophyllaceae | Elizabeth Campion |
| Silene setisperma | | Caryophyllaceae | Himalayan Campion |
| Silene vulgaris | | Caryophyllaceae | Bladder Campion |
| Sinningia speciosa | Gloxinia speciosa | Gesneriaceae | Gloxinia |
| Sisymbrium irio | | Brassicaceae | London Rocket |
| Sisymbrium officinale | Erysimum officinale | Brassicaceae | Hedge Mustard |
| Smilax ovalifolia | Smilax macrophylla, Smilax zeylanica | Liliaceae | Kumarika |
| Smithia bigemina | | Fabaceae | Double Paired Smithia |
| Smithia conferta | Smithia geminiflora | Fabaceae | Paired Flower Smithia |
| Smithia hirsuta | | Fabaceae | Hairy Smithia |
| Smithia purpurea | | Fabaceae | Purple Smithia |
| Smithia sensitiva | | Fabaceae | Sensitive Smithia |
| Smithia setulosa | | Fabaceae | Bristly Smithia |
| Smithsonia viridiflora | Aerides dalzelliana, Sarcochilus dalzelliana, Micropera viridiflora | Orchidaceae | Guchchha Irid Amri |
| Smitinandia micrantha | Saccolabium micranthum, Ceratochilus micranthus | Orchidaceae | Small Flowered Smitinandia |
| Solanum betaceum | Cyphomandra betacea, Solanum crassifolium, Cyphomandra crassifolia | Solanaceae | Tree Tomato |
| Solanum carolinense L. | | Solanaceae | Horse Nettle |
| Solanum diphyllum | | Solanaceae | Twoleaf Nightshade |
| Solanum erianthum | Solanum verbascifolium | Solanaceae | Big Eggplant |
| Solanum indicum | | Solanaceae | Indian Nightshade |
| Solanum laxum | Solanum jasminoides, Solanum boerhaviifolium, Solanum triphyllum | Solanaceae | Potato Vine |
| Solanum macranthum | | Solanaceae | Potato Tree |
| Solanum melongena | | Solanaceae | Brinjal |
| Solanum nigrum | | Solanaceae | Black Nightshade |
| Solanum pseudocapsicum | | Solanaceae | Jerusalem Cherry |
| Solanum sisymbriifolium | | Solanaceae | Sticky Nightshade |
| Solanum torvum | | Solanaceae | Turkey Berry |
| Solanum trilobatum | | Solanaceae | Purple Fruited Pea Eggplant |
| Solanum tuberosum | | Solanaceae | Potato |
| Solanum virginianum | Solanum surattense, Solanum xanthocarpum | Solanaceae | Thorny Nightshade |
| Solanum wendlandii | | Solanaceae | Giant Potato Creeper |
| Solena amplexicaulis | Bryonia amplexicaulis, Melothria amplexicaulis, Solena heterophylla, Zehneria umbellata | Cucurbitaceae | Creeping Cucumber |
| Solidago canadensis | | Asteraceae | Common Goldenrod |
| Solidago gigantea | | Asteraceae | Giant Goldenrod |
| Sonchus arvensis | | Asteraceae | Field Sow-Thistle |
| Sonchus asper | | Asteraceae | Prickly Sow-Thistle |
| Sonchus oleraceus | | Asteraceae | Sow Thistle |
| Sonerila scapigera | | Melastomataceae | Scaped Sonerila |
| Sonneratia apetala | | Sonneratiaceae | Sonneratia Mangrove |
| Sonneratia caseolaris | | Sonneratiaceae | Apple Mangrove |
| Sophora tomentosa | | Fabaceae | Necklace Pod |
| Sopubia delphinifolia | | Scrophulariaceae | Common Sopubia |
| Sopubia trifida | Gerardia scabra, Gerardia sopubia | Scrophulariaceae | Split Leaf Sopubia |
| Sorbaria tomentosa | Spiraea lindleyana, Spiraea sorbifolia | Rosaceae | Kashmir False Spirea |
| Sorbus lanata | Pyrus lanata | Rosaceae | Hairy Rowan |
| Sorbus microphylla | | Rosaceae | Small Leaf Rowan |
| Sorbus wallichii | Pyrus wallichii | Rosaceae | Wallich's Rowan |
| Sorghum bicolor | | Poaceae | Jowar |
| Sorghum halepense | Andropogon halepensis | Poaceae | Johnson Grass |
| Spartium junceum | | Fabaceae | Spanish Broom |
| Spathiphyllum wallisii | | Araceae | Peace Lily |
| Spathodea campanulata | | Bignoniaceae | African Tulip Tree |
| Spathoglottis plicata | | Orchidaceae | Ground Orchid |
| Spatholobus parviflorus | Butea parviflora | Fabaceae | Bando Lata |
| Spermacoce articularis | Spermacoce scabra, Borreria articularis, Spermacoce flexuosa | Rubiaceae | Jointed Buttonweed |
| Spermacoce ocymoides | Borreria ocymoides, Spermacoce tenera, Spermacoce domingensis | Rubiaceae | Purple Leaved Button Weed |
| Spermacoce pusilla | Spermacoce kleinii, Spermacoce gardneri, Borreria pusilla | Rubiaceae | Tiny False Buttonweed |
| Spermadictyon suaveolens | Hamiltonia suaveolens, Hamiltonia mysorensis | Rubiaceae | Forest Champa |
| Spermadictyon suaveolens var. azureum | Spermadictyon azureum | Rubiaceae | Blue Forest Champa |
| Sphaeranthus indicus | | Asteraceae | East Indian Globe Thistle |
| Spiraea bella | | Rosaceae | Pretty Spirea |
| Spiraea canescens | Spiraea flagelliformis, Spiraea rotundifolia | Rosaceae | Grey Stem Spiraea |
| Spiraea japonica | | Rosaceae | Japanese Spirea |
| Spiranthes sinensis | Spiranthes lancea, Spiranthes pudica, Spiranthes australis | Orchidaceae | Chinese Lady's-Tresses |
| Spondias pinnata | Spondias mangifera, Mangifera pinnata | Anacardiaceae | Wild Mango |
| Stachys emodi | Stachys sericea, Stachys splendens | Lamiaceae | Silky Woundwort |
| Stachys melissaefolia | | Lamiaceae | Bee Leaf Woundwort |
| Stachytarpheta australis | | Verbenaceae | White Porterweed |
| Stachytarpheta indica | | Verbenaceae | Indian Snakeweed |
| Stachytarpheta jamaicensis | | Verbenaceae | Blue Porterweed |
| Stachytarpheta mutabilis | Verbena mutabilis | Verbenaceae | Pink Snakeweed |
| Stellaria graminea | | Caryophyllaceae | Grasslike Starwort |
| Stellaria media | | Caryophyllaceae | Chickweed |
| Stemodia viscosa | | Scrophulariaceae | Sticky Blue Rod |
| Stenotaphrum dimidiatum | Stenotaphrum glabrum, Panicum dimidiatum | Poaceae | Pemba Grass |
| Stephania japonica | Menispermum japonicum, Cissampelos hemandifolia, | Menispermaceae | Tape Vine |
| Stephanotis floribunda | | Asclepiadaceae | Madagascar Jasmine |
| Sterculia foetida | | Sterculiaceae | Java Olive |
| Sterculia guttata | | Sterculiaceae | Spotted Sterculia |
| Sterculia urens | | Sterculiaceae | Gum Karaya |
| Sterculia villosa | | Sterculiaceae | Hairy Sterculia |
| Sterculia villosa | | Sterculiaceae | Udal |
| Stereospermum colais | Bignonia colais, Stereospermum personatum | Bignoniaceae | Yellow Snake Tree |
| Stevia rebaudiana | Eupatorium rebaudianum | Asteraceae | Stevia |
| Stictocardia tiliifolia | Convolvulus tiliifolius, Argyreia tiliifolia, Ipomoea tiliifolia, Rivea tiliifolia | Convolvulaceae | Spotted Heart |
| Stokesia laevis | | Asteraceae | Stokes Aster |
| Streblus asper | | Moraceae | Sand Paper Tree |
| Strelitzia reginae | | Strelitziaceae | Bird of Paradise |
| Streptocarpus rexii | Didymocarpus rexii | Gesneriaceae | Cape Primrose |
| Streptopus simplex | | Liliaceae | Simple Twisted Stalk |
| Streptosolen jamesonii | | Solanaceae | Marmalade Bush |
| Striga asiatica | Striga lutea | Scrophulariaceae | Asiatic Witchweed |
| Striga densiflora | | Scrophulariaceae | Denseflower Witchweed |
| Striga gesnerioides | | Scrophulariaceae | Purple Witchweed |
| Strobilanthes attenuata | Pteracanthus urticifolius | Acanthaceae | Blue Nettle |
| Strobilanthes auriculata | Perilepta auriculata | Acanthaceae | Eared Leaf Strobilanthes |
| Strobilanthes callosus | Carvia callosa | Acanthaceae | Karvy |
| Strobilanthes cusia | Strobilanthes flaccidifolius | Acanthaceae | Assam Indigo |
| Strobilanthes frondosa | | Acanthaceae | Leafy Strobilanthes |
| Strobilanthes ixiocephalus | Thelepaepale ixiocephala | Acanthaceae | Sky Blue Karvy |
| Strobilanthes kunthiana | | Acanthaceae | Kurinji |
| Strobilanthes maculata | Ruellia maculata | Acanthaceae | Spotted Strobilanthes |
| Strobilanthes micranthus | | Acanthaceae | Small Flowered Strobilanthes |
| Strobilanthes sabiniana | Ruellia sabiniana, Strobilanthes sabiniana var. argentea | Acanthaceae | Sabine's Strobilanthes |
| Strobilanthes wallichii | Strobilanthes atropurpureus | Acanthaceae | Kashmir Acanthus |
| Strophanthus boivinii | Roupellina boivinii | Apocynaceae | Corkscrew Flower |
| Strophanthus gratus | | Apocynaceae | Climbing Oleander |
| Strychnos nux-vomica | | Loganiaceae | Nux Vomica |
| Stylosanthes fruticosa | Arachis fruticosa, Stylosanthes bojeri, Stylosanthes mucronata | Fabaceae | Shrubby Pencil-Flower |
| Suaeda maritima | Chenopodium maritimum | Chenopodiaceae | Annual Sea-Blite |
| Suregada multiflora | Gelonium multiflorum | Euphorbiaceae | False Lime |
| Swainsona formosa | Clianthus formosus | Fabaceae | Sturt's Desert Pea |
| Swertia bimaculata | Ophelia bimaculata | Gentianaceae | Double-Spotted Swertia |
| Swertia densifolia | | Gentianaceae | Dense Leaved Swertia |
| Swertia hookeri | | Gentianaceae | Indian Gentian |
| Swertia minor | Ophelia minor, Pleurogyna minor | Gentianaceae | Lesser Swertia |
| Swertia paniculata | Ophelia paniculata, Ophelia wallichii, Swertia gracilescens | Gentianaceae | Panicled Swertia |
| Swietenia macrophylla | | Meliaceae | Big-Leaf Mahogany |
| Symphorema involucratum | | Verbenaceae | Bhingri |
| Symphytum officinale | Symphytum uliginosum | Boraginaceae | Comfrey |
| Symplocos glomerata | | Symplocaceae | Clustered Sapphire Berry |
| Synadenium grantii | | Euphorbiaceae | African Milk Bush |
| Synedrella nodiflora | | Asteraceae | Cinderella Weed |
| Syngonium spp. | | Araceae | Arrowhead Plant |
| Syringa emodi | | Oleaceae | Himalayan Lilac |
| Syzygium cumini | | Myrtaceae | Jamun |
| Syzygium heyneanum | Eugenia heyneana | Myrtaceae | Kath Jamun |
| Syzygium jambos | | Myrtaceae | Malabar Plum |
| Syzygium malaccense | Eugenia malaccensis, Jambosa malaccensis | Myrtaceae | Malay Apple |
| Syzygium nervosum | Cleistocalyx nervosum, Cleistocalyx operculatus, Eugenia operculata, Syzygium operculatum | Myrtaceae | Rai Jamun |
| Tabebuia aurea | Tabebuia caraiba | Bignoniaceae | Caribbean Trumpet Tree |
| Tabebuia berteroi | Tecoma berteroi | Bignoniaceae | Hispaniolan Rosy Trumpet Tree |
| Tabebuia heterophylla | Tabebuia pallida, Tabebuia pentaphylla | Bignoniaceae | Cuban Pink Trumpet Tree |
| Tabebuia rosea | | Bignoniaceae | Pink Trumpet Tree |
| Tabebuia roseo-alba | | Bignoniaceae | White Trumpet Tree |
| Tabernaemontana alternifolia | Ervatamia heyneana, Tabernaemontana heyneana | Apocynaceae | Nag Kuda |
| Tabernaemontana divaricata 'Flore Pleno' | | Apocynaceae | Crape Jasmine Flore Pleno |
| Tabernaemontana divaricata | Ervatamia divaricata, Nerium coronarium | Apocynaceae | Crape Jasmine |
| Tacca chantrieri | | Taccaceae | Bat Flower |
| Tacca leontopetaloides | Tacca hawaiiensis, Tacca involucrata, Tacca pinnatifida | Taccaceae | Fiji Arrowroot |
| Tadehagi triquetrum | Desmodium triquetrum, Hedysarum triquetrum, Pteroloma triquetrum | Fabaceae | Trefle Gros |
| Tagetes erecta | | Asteraceae | Marigold orange |
| Tagetes erecta | | Asteraceae | Marigold yellow |
| Tagetes minuta | | Asteraceae | Wild Marigold |
| Talinum fruticosum | Talinum triangulare, Portulaca triangularis, Portulaca fruticosa | Portulacaceae | Ceylon Spinach |
| Talipariti hastatum | Hibiscus hastatus, Hibiscus tiliaceus subsp. hastatus | Malvaceae | Lobed Leaf Sea Hibiscus |
| Talipariti tiliaceum | Hibiscus tiliaceus, Hibiscus tiliaceus subsp. tiliaceus | Malvaceae | Sea Hibiscus |
| Tamaricaria elegans | Myricaria elegans, Myrtama elegans | Tamaricaceae | Elegant False Tamarisk |
| Tamarindus indica | | Caesalpiniaceae | Tamarind |
| Tamarix aphylla | | Tamaricaceae | Athel Pine |
| Tamarix ericoides | Myricaria vaginata, Tamarix mucronata, Trichurus ericoides | Tamaricaceae | Erica Tamarisk |
| Tamilnadia uliginosa | Gardenia uliginosa, Catunaregam uliginosa, Randia uliginosa, Gardenia pomifera | Rubiaceae | Divine Jasmine |
| Tanacetum mutellinum | | Asteraceae | Prostrate Tansy |
| Tanacetum parthenium | Chrysantheim parthenium, Pyrethrum parthenium | Asteraceae | Feverfew |
| Taraxacum officinale | | Asteraceae | Dandelion |
| Taxodium mucronatum | | Cupressaceae | Mexican Cypress |
| Tecoma capensis | Tecomaria capensis, Bignonia capensis | Bignoniaceae | Cape Honeysuckle |
| Tecoma castanifolia | | Bignoniaceae | Chestnutleaf Trumpetbush |
| Tecoma fulva | Bignonia fulva | Bignoniaceae | Cahuato |
| Tecoma stans | | Bignoniaceae | Yellow Bells |
| Tecoma stans var. angustata | | Bignoniaceae | Yellow Trumpet Flower |
| Tecomella undulata | Tecoma undulata, Bignonia undulata | Bignoniaceae | Roheda |
| Tectona grandis | | Verbenaceae | Teak |
| Telosma cordata | Telosma minor, Pergularia minor, Oxystelma ovatum, Telosma odoratissima, Asclepias cordata, Pergularia odoratissima | Asclepiadaceae | Fragrant Telosma |
| Telosma pallida | Asclepias pallida, Pergularia pallida | Asclepiadaceae | Telosma Vine |
| Tephrosia candida | Cracca candida, Xiphocarpus candidus | Fabaceae | White Hoary Pea |
| Tephrosia purpurea | | Fabaceae | Wild Indigo |
| Tephrosia tinctoria | Galega tinctoria, Cracca tinctoria, Tephrosia pulcherrima | Fabaceae | Orange Tephrosia |
| Teramnus labialis var. mollis | Glycine labialis, Glycine debilis | Fabaceae | Blue Wiss |
| Terminalia arjuna | | Combretaceae | Arjun Tree |
| Terminalia bellirica | Myrobalanus bellirica | Combretaceae | Baheda |
| Terminalia catappa | | Combretaceae | Indian Almond |
| Terminalia chebula | | Combretaceae | Chebulic Myrobalan |
| Terminalia elliptica | Terminalia alata | Combretaceae | Asan |
| Terminalia muelleri | Myrobalanus muelleri | Combretaceae | Australian Almond |
| Terminalia paniculata | Pentaptera paniculata | Combretaceae | Flowering Murdah |
| Tetrastigma bracteolatum | Vitis bracteolata | Vitaceae | Monjam Hei |
| Thalictrum alpinum | | Ranunculaceae | Alpine Meadow Rue |
| Thalictrum cultratum | Thalictrum deciternatum | Ranunculaceae | Knife-like Meadow Rue |
| Thalictrum dalzellii | | Ranunculaceae | Hill Meadow Rue |
| Thalictrum foliosum | | Ranunculaceae | Leafy Meadow-Rue |
| Theobroma cacao | | Sterculiaceae | Cocoa Tree |
| Thermopsis barbata | | Fabaceae | Black Pea |
| Thespesia lampas | Azanza lampas, Hibiscus lampas | Malvaceae | Ban Kapas |
| Thespesia populnea | | Malvaceae | Indian Tulip Tree |
| Thevetia peruviana | Thevetia neriifolia, Cascabela thevetia | Apocynaceae | Mexican Oleander |
| Thladiantha cordifolia | Thladiantha calcarata | Cucurbitaceae | Himalayan Goldencreeper |
| Thrinax radiata | Thrinax floridana, Coccothrinax radiata | Arecaceae | Florida Thatch Palm |
| Thunbergia alata | | Acanthaceae | Black-Eyed Susan Vine |
| Thunbergia coccinea | | Acanthaceae | Scarlet Clock Vine |
| Thunbergia erecta | Meyenia erecta | Acanthaceae | King's Mantle |
| Thunbergia fragrans | | Acanthaceae | Sweet Clock Vine |
| Thunbergia grandiflora | | Acanthaceae | Bengal Clock Vine |
| Thunbergia laurifolia | Thunbergia grandiflora var. laurifolia, Thunbergia harrisii | Acanthaceae | Laurel Clock Vine |
| Thunbergia mysorensis | Hexacentris mysorensis | Acanthaceae | Mysore Clock Vine |
| Thunia alba var. alba | Thunia marshalliana, Phaius marshallianus, Phajus marshallianus | Orchidaceae | White Thunia |
| Thymophylla tenuiloba | Dyssodia tenuiloba | Asteraceae | Dahlberg Daisy |
| Thymus linearis | Thymus himalayicus | Lamiaceae | Himalayan Thyme |
| Thymus vulgaris | | Lamiaceae | Common Thyme |
| Thysanolaena latifolia | Thysanolaena maxima, Agrostis maxima, Melica latifolia, Thysanolaena agrostis | Poaceae | Tiger Grass |
| Tibouchina urvilleana | Tibouchina maudhiana, Tibouchina semidecandra, Lasiandra semidecandra | Melastomataceae | Princess Flower |
| Tigridia pavonia | | Iridaceae | Tiger Flower |
| Tilia cordata | Tilia parvifolia, Tilia ulmifolia | Tiliaceae | Small Leaved Lime |
| Tinantia erecta | Tradescantia erecta, Pomogesia erecta, Tinantia fugax | Commelinaceae | Upright Spiderwort |
| Tinospora cordifolia | | Menispermaceae | Gulbel |
| Tipuana tipu | Machaerium tipu, Tipuana speciosa | Fabaceae | Tipu Tree |
| Tithonia diversifolia | | Asteraceae | Giant Mexican Sunflower |
| Tithonia rotundiflora | | Asteraceae | Mexican Sunflower |
| Tolypanthus lagenifer | Loranthus lageniferus | Loranthaceae | Indian Tolypanthus |
| Toona ciliata | | Meliaceae | Toon Tree |
| Torenia fournieri 'Catalina Pink' | | Scrophulariaceae | Wishbone Flower pink |
| Torenia fournieri | | Scrophulariaceae | Wishbone Flower |
| Torenia Indica | Torenia cordifolia | Scrophulariaceae | Indian Wishbone Flower |
| Torilis japonica | Caucalis japonica, Torilis anthriscus, Caucalis anthriscus | Apiaceae | Upright Hedge Parsley |
| Toxicodendron parviflorum | Rhus parviflora | Anacardiaceae | Small Flowered Poison Sumac |
| Trachelospermum jasminoides | | Apocynaceae | Confederate Jasmine |
| Trachyspermum roxburghianum | Pimpinella lateriflora, Pimpinella dalzellii, Carum roxburghianum | Apiaceae | Wild Celery |
| Tradescantia pallida | | Commelinaceae | Purple Heart |
| Tradescantia spathacea | Rhoeo spathacea | Commelinaceae | Moses in the Cradle |
| Tragia involucrata | | Euphorbiaceae | Climbing Nettle |
| Tragus roxburghii | Lappago biflora, Nazia racemosa, Tragus biflorus | Poaceae | Indian Bur Grass |
| Trema orientalis | | Cannabaceae | Indian Charcoal Tree |
| Trianthema portulacastrum | Trianthema monogyna | Aizoaceae | Desert Horse Purslane |
| Tribulus terrestris | | Zygophyllaceae | Puncture Vine |
| Trichodesma inaequale | Trichodesma amplexicaule | Boraginaceae | Clasping-Leaf Borage |
| Trichodesma indicum | | Boraginaceae | Indian Borage |
| Tricholepis amplexicaulis | | Asteraceae | Dahan |
| Tricholepis glaberrima | | Asteraceae | Smooth Tricholepis |
| Tricholepis radicans | | Asteraceae | Lahan |
| Trichosanthes cucumerina | | Cucurbitaceae | Snake Gourd |
| Trichosanthes tricuspidata | Trichosanthes palmata, Trichosanthes bracteata, Modecca bracteata | Cucurbitaceae | Indrayan |
| Tridax procumbens | | Asteraceae | Tridax Daisy |
| Trifolium pratense | | Fabaceae | Red Clover |
| Trifolium repens | | Fabaceae | White Clover |
| Trigonella corniculata | Trifolium corniculatum | Fabaceae | Cultivated Fenugreek |
| Trigonella emodi/emodii | | Fabaceae | Himalayan Fenugreek |
| Trigonella foenum-graecum | | Fabaceae | Fenugreek |
| Trillium govanianum | Trillidium govanianum | Liliaceae | Himalayan Trillium |
| Triplaris weigeltiana | Blochmannia weigeltiana, Triplaris surinamensis | Polygonaceae | Ant Tree |
| Tristellateia australasiae | | Malpighiaceae | Australian Gold Vine |
| Triticum aestivum | | Poaceae | Wheat |
| Triumfetta pentandra | Triumfetta cuneata, Triumfetta neglecta | Tiliaceae | Fivestamen Burrbark |
| Triumfetta rhomboidea | | Tiliaceae | Burr Bush |
| Trollius acaulis | | Ranunculaceae | Dwarf Globe Flower |
| Tropaeolum majus | | Tropaeolaceae | Nasturtium |
| Trudelia cristata | Vanda cristata, Aerides cristatum, Luisia striata | Orchidaceae | Comb Trudelia |
| Tulipa spp. | | Liliaceae | Tulip |
| Turnera subulata | | Turneraceae | White Alder |
| Turnera ulmifolia | | Turneraceae | Yellow Alder |
| Turraea villosa | Turraea obtusifolia | Meliaceae | Kapur Bhendi |
| Tylophora indica | Asclepias asthmatica, Tylophora asthmatica, Cynanchum indicum | Asclepiadaceae | Indian Ipecac |
| Typha angustata | Typha angustifolia var. angustata | Typhaceae | Lesser Indian Reed Mace |
| Typhonium trilobatum | Arum trilobatum, Arum orixense | Araceae | Bengal Arum |
| Ulex europaeus | | Fabaceae | Common Gorse |
| Uraria hamosa | Doodia hamosa | Fabaceae | Hooked Uraria |
| Uraria picta | Hedysarum pictum | Fabaceae | Dabra |
| Urechites lutea | | Apocynaceae | Wild Allamanda |
| Urena lobata | | Malvaceae | Caesarweed |
| Urena sinuata | Urena lobata ssp. sinuata, Urena lobata var. sinuata | Malvaceae | Burr Mallow |
| Urtica ardens | Urtica himalayensis, Urtica parviflora | Urticaceae | Himalayan Nettle |
| Utricularia babui | | Lentibulariaceae | Babu Bladderwort |
| Utricularia graminifolia | | Lentibulariaceae | Grass Leaved Bladderwort |
| Utricularia purpurascens | | Lentibulariaceae | Purple Bladderwort |
| Utricularia reticulata | | Lentibulariaceae | Net Veined Bladderwort |
| Utricularia spp. | | Lentibulariaceae | Bladderwort |
| Utricularia striatula | | Lentibulariaceae | Striped Bladderwort |
| Vaccaria hispanica | Vaccaria pyramidata, Saponaria vaccaria | Caryophyllaceae | Cow Cockle |
| Valeriana hardwickii | Valeriana elata | Valerianaceae | Indian Valerian |
| Valeriana pyrolifolia | | Valerianaceae | Valerian Plant |
| Vallaris solanacea | Vallaris heynei | Apocynaceae | Bread Flower |
| Vanda bicolor | | Orchidaceae | Bicolor Vanda |
| Vanda coerulea f. luwangalba | | Orchidaceae | Luwangba's White Vanda |
| Vanda coerulea | | Orchidaceae | Blue Vanda |
| Vanda stangeana | | Orchidaceae | Stange's Vanda |
| Vandopsis parishii | | Orchidaceae | Kwaklei Nathabi |
| Vanilla planifolia | | Orchidaceae | Vanilla Creeper |
| Venidium fastuosum | | Asteraceae | Venidium orange |
| Venidium fastuosum 'Zulu Prince' | | Asteraceae | Venidium Zulu Prince |
| Ventilago maderaspatana | | Rhamnaceae | Red Creeper |
| Verbascum chinense | Celsia coromandeliana | Scrophulariaceae | Chinese Mullein |
| Verbascum thapsus | | Scrophulariaceae | Great Mullein |
| Verbena hybrida | | Verbenaceae | Verbena |
| Verbena officinalis | | Verbenaceae | Vervain |
| Verbesina encelioides | | Asteraceae | Golden Crownbeard |
| Vernonia arborea | Vernonia monosis, Vernonia javanica | Asteraceae | Tree Vernonia |
| Vernonia divergens | | Asteraceae | Bandar |
| Vernonia elaeagnifolia | Vernonia eleagnifolia | Asteraceae | Curtain Creeper |
| Vernonia indica | Decaneurum dendigulense | Asteraceae | Indian Vernonia |
| Vernonia volkameriifolia | | Asteraceae | Himalayan Tree Vernonia |
| Veronica persica | | Scrophulariaceae | Persian Speedwell |
| Veronica polita | Veronica didyma | Scrophulariaceae | Grey Field-Speedwell |
| Veronica spicata | | Scrophulariaceae | Blue Veronica |
| Viburnum cotinifolium | | Adoxaceae | Smoketree Leaved Viburnum |
| Viburnum erubescens | | Caprifoliaceae | Reddish Viburnum |
| Vicia faba | | Fabaceae | Broad Bean |
| Vicia sepium | | Fabaceae | Bush Vetch |
| Victoria amazonica | | Nymphaeaceae | Giant Water Lily |
| Vigna radiata var. sublobata | Phaseolus sublobatus, Phaseolus trinervis, Vigna sublobata | Fabaceae | Wild Moong |
| Vigna trilobata | Dolichos trilobatus, Phaseolus trilobatus, Phaseolus trilobus | Fabaceae | Wild Gram |
| Vigna vexillata | | Fabaceae | Zombi Pea |
| Vinca major | | Apocynaceae | Large Leaf Periwinkle |
| Vinca minor | | Apocynaceae | Lesser Periwinkle |
| Viola betonicifolia | | Violaceae | Arrowhead Violet |
| Viola biflora | | Violaceae | Yellow Wood Violet |
| Viola canescens | Viola serpens var. canescens | Violaceae | Himalayan White Violet |
| Viola spp. | | Violaceae | Violet |
| Viola x wittrockiana | | Violaceae | Pansy |
| Viscum articulatum | Viscum nepalense | Viscaceae | Leafless Mistletoe |
| Vitex altissima | | Verbenaceae | Peacock Chaste Tree |
| Vitex negundo | | Verbenaceae | Chaste Tree |
| Vriesea splendens | | Bromeliaceae | Flaming Sword |
| Vriesea 'Tiffany' | | Bromeliaceae | Vriesea Tiffany |
| Waltheria indica | Waltheria americana, Waltheria pyrolaefolia | Sterculiaceae | Sleepy Morning |
| Washingtonia filifera | | Arecaceae | California Fan Palm |
| Watsonia meriana | Watsonia meriana var. bulbillifera, Watsonia bulbillifera, Antholyza meriana | Iridaceae | Wild Bugle Lily |
| Wedelia chinensis | Solidago chinensis | Asteraceae | Chinese Wedelia |
| Wedelia trilobata | | Asteraceae | Yellow Dots |
| Wedelia urticaefolia | | Asteraceae | Nettle Leaved Wedelia |
| Wendlandia heynei | Rondeletia heynei, Rondeletia exserta, Wendlandia exserta | Rubiaceae | Tilki |
| Wendlandia thyrsoidea | Canthium thyrsoideum, Wendlandia notoniana, Cupia thyrsoidea, Ixora montana | Rubiaceae | Showla |
| Wisteria frutescens | Wisteria macrostachya, Wisteria frutescens var. macrostachya | Fabaceae | American Wisteria |
| Wisteria sinensis | | Fabaceae | Chinese Wisteria |
| Withania somnifera | | Solanaceae | Ashwagandha |
| Woodfordia fruticosa | Woodfordia floribunda | Lythraceae | Fire Flame Bush |
| Wrightia antidysenterica | Nerium antidysentericum, Nerium zeylanicum, Wrightia zeylanica | Apocynaceae | Arctic Snow |
| Wrightia arborea | Periploca arborea, Wrightia tomentosa | Apocynaceae | Woolly Dyeing Rosebay |
| Wrightia tinctoria | | Apocynaceae | Sweet Indrajao |
| Xanthium strumarium | Xanthium indicum | Asteraceae | Common Cocklebur |
| Xantolis tomentosa | Achras elengioides, Planchonella dongnaiensis, Sapota elengioides | Sapotaceae | Hairy Xantolis |
| Xenostegia tridentata | Merremia tridentata | Convolvulaceae | Arrow-leaf Morning Glory |
| Xylia xylocarpa | Mimosa xylocarpa, Xylia dolabriformis | Mimosaceae | Burma Ironwood |
| Xylosma longifolia | | Flacourtiaceae | Dandal |
| Yucca aloifolia | | Agavaceae | Spanish Dagger |
| Zamia furfuracea | | Zamiaceae | Cardboard Palm |
| Zantedeschia aethiopica | Calla aethiopica, Richardia africana, Richardia aethiopica, Colocasia aethiopica | Araceae | Calla Lily |
| Zantedeschia elliottiana | | Araceae | Golden Calla Lily |
| Zanthoxylum armatum | Zanthoxylum alatum | Rutaceae | Winged Prickly Ash |
| Zea mays | | Poaceae | Maize |
| Zehneria scabra | Melothria perpusilla | Cucurbitaceae | Wild Cucumber |
| Zephyranthes candida | | Amaryllidaceae | Rain Lily white |
| Zephyranthes carinata | Zephyranthes grandiflora | Amaryllidaceae | Rain Lily pink |
| Zephyranthes citrina | Zephyranthes sulphurea | Amaryllidaceae | Rain Lily yellow |
| Zephyranthes primulina | | Amaryllidaceae | Primrose Rain Lily |
| Zephyranthes rosea | | Amaryllidaceae | Rain Lily Rose |
| Zeuxine pantlingii | | Orchidaceae | Pantling's Jewel Orchid |
| Zeuxine strateumatica | Orchis strateumatica, Zeuxine sulcata, Adenostylis strateumatica | Orchidaceae | Lawn Orchid |
| Zingiber chrysanthum | | Zingiberaceae | Golden Flowered Ginger |
| Zingiber neesanum | Alpinia neesana, Zingiber macrostachyum | Zingiberaceae | Neesam Ginger |
| Zingiber officinale | | Zingiberaceae | Ginger |
| Zingiber rubens | | Zingiberaceae | Bengal Ginger |
| Zinnia Elegance | | Asteraceae | Zinnia Purity White |
| Zinnia Elegance | | Asteraceae | Zinnia Thumbelina |
| Zinnia elegans | | Asteraceae | Zinnia |
| Zinnia hybrida 'Profusion Orange' | | Asteraceae | Zinnia 'Profusion Orange' |
| Zinnia peruviana | Crassina multiflora, Zinnia multiflora, Zinnia pauciflora, Chrysogonum peruvianum | Asteraceae | Peruvian Zinnia |
| Ziziphus caracutta | Ziziphus glaberrima, Ziziphus xylopyra var. glaberrim | Rhamnaceae | Kath Ber |
| Ziziphus mauritiana | | Rhamnaceae | Ber |
| Ziziphus nummularia | Rhamnus nummularia, Ziziphus rotundifolia | Rhamnaceae | Jhar Beri |
| Ziziphus oenoplia | | Rhamnaceae | Jackal Jujube |
| Ziziphus rugosa | Zizyphus rugosa, Ziziphus glabra | Rhamnaceae | Wild Jujube |
| Zornia gibbosa | Zornia angustifolia, Zornia graminea | Fabaceae | Grasslike Zornia |