帚序苎麻(原变种) zhou xu zhu ma (yuan bian zhong)

Boehmeria heteroidea Blume; B. heteroidea var. latifolia Gagnepain.

Branchlets and petioles glabrous. Leaf blade ovate, broadly ovate to subcordate, or in upper branches narrowly ovate or narrowly elliptic, 8-17(-20) × 4.5-12 cm, base rounded or subcordate. Male perianth glabrous or subglabrous. Fruiting perianth tube sessile, brown, obovoid or ellipsoid with a cuneate to ± stipitate base, compressed, 0.8-1 mm, smooth, sparsely pubescent, apex with prolonged neck, ca. 0.2 mm, 2(or 3)-toothed. Fl. Jul-Sep, fr. Sep-Nov.

Forests, thickets, along streams; 400-1200 m. S Yunnan [E India, Indonesia, Laos, Myanmar, Thailand, Vietnam].