Botanical name: Cystacanthus vitellinus Family: Acanthaceae (Acanthus family)
Synonyms: Justicia vitellina, Phlogacanthus vitellinus
Red Nongmangkha is a Shrub up to 1.5 m tall. Stems are round, hairless. Leaf-stalk 1-5 cm; leaf blade broadly ovate to oblong-lanceshaped, 10-30 x 6-11 cm, below slightly velvet-hairy or becoming hairless, above hairless or slightly velvet-hairy, secondary veins 9-11 on each side of midvein, base narrowed and decurrent onto leaf-stalk, margin slightly wavy, tip pointed to tapering. Thyrses 10-20 cm; bracts minute; bracteoles linear, about 1.5 x 0.5 mm, velvet-hairy. Flower-stalk 1-3 mm. Calyx about 6 mm, velvet-hairy; lobes linear-lanceshaped. Flower purplish red or white, 1.2-1.8 cm, bent to 90o and abruptly inflated at middle, outside velvet-hairy. Stamens about 1 cm; filaments hairy at base; anther thecae oblong, about 2 mm, connective hairless; staminodes very small. Ovary hairless; style 1-1.5 cm, hairless; stigma slightly 2-cleft. Capsule club-shaped, about 2 cm, 8-seeded. Seeds ovate in outline, about 2.5 × 2 mm. Red Nongmangkha is found in NE.
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