Botanical name: Rotala mexicana Family: Lythraceae (Crape Myrtle family)
Synonyms: Ammannia rosea, Rotala apetala
Mexican Rotala is an annual, aquatic, amphibious, or terrestrial herb. Stem is 3-10 cm, creeping, floating, or erect and ascending, branching. Leaves are 3-5-8-whorled, aerial leaves narrowly lanceshaped to broadly linear or ovate, 5-10 x 1.5-2 mm, base narrow, tip flat and often 2-cleft. Submerged leaves are linear, up to 15 x 0.5 mm. Flowers are borne solitary, stalkless, in leaf axils. Bracteoles are linear, about as long as floral tube. Floral tube is bell-shaped, translucent, about 0.5 mm, sepals (3 or)4(or 5), epicalyx absent. Petals are absent. Stamens are not protruding out. Ovary is subglobose; style included, much shorter than ovary. Capsule is about 1 mm in diam., (2 or)3-valved. Seeds about 0.3 mm. Mexican Rotala is widely spread throughout the warmer parts of the world. Flowering: September-December.
Identification credit: Navendu Pagé
The flower labeled Mexican Rotala is ...