宽角楼梯草 kuan jiao lou ti cao

Herbs perennial, monoecious or dioecious, 44-80 cm tall. Stems ascending or erect, simple, densely ferruginous-furfuraceous. Leaves alternate; nanophylls absent; stipules linear, 14-17 × 4-5 mm, ciliolate, without cystoliths; petiole 2-5 mm; leaf blade obliquely elliptic or narrowly ovate, 5-15 × 2.5-4.5 cm, papery, major basal lateral veins asymmetric, 1 basal, the other arising above base, abaxial surface puberulent, adaxial surface glabrous, cystoliths conspicuous, dense; base with broader half broadly cuneate or nearly rounded, margin dentate, apex acuminate or caudate. Male inflorescences solitary, simple, 7-15 mm in diam.; peduncle ca. 5 mm; receptacle nearly orbicular, 7-14 mm in diam.; bracts obscure; bracteoles linear. Female inflorescences solitary, 4-6 mm in diam.; peduncle ca. 0.6 mm; receptacle 3-5 mm in diam.; bracts ovate; bracteoles narrowly obovate or linear. Male flowers 4-merous. Fl. Jun.

* Valley streamsides; ca. 1700 m. NW Yunnan.