三室黄麻 san shi huang ma

Herbs annual or perennial, many branched, pilose. Stipule subulate; petiole 0.5-1 cm, pilose; leaf blade elliptic or ovate-oblong, 1.5-3 × 1-2 cm, hairy only on veins abaxially, glabrous adaxially, lateral basal veins 1/3 as long as leaf blade, base broadly rounded, margin crenate, apex obtuse. Cymes opposite to leaves, 1-3-flowered; peduncle very short. Sepals ca. 5 mm. Petals nearly spatulate, 5-6 mm. Stamens 15-20; filaments 5-6 mm. Ovary 3-loculed. Capsule 1-3-fascicled, long cylindrical, 5-7 × ca. 0.3 cm, apex beaked. Seeds separated by septum. Fl. Aug, fr. Sep.

Moist shady places, weed of cultivated fields. NW Yunnan [Afghanistan, Bhutan, India, Indonesia (Java), Pakistan, Sri Lanka; tropical and N Africa, S Asia, Australia].