永顺楼梯草 yong shun lou ti cao

Herbs perennial, dioecious, ca. 35 cm tall. Stems ascending, simple, glabrous. Leaves alternate; nanophylls absent; stipules linear-lanceolate, ca. 7 × 2 mm, glabrous, without cystoliths; petiole 0.5-2 mm; leaf blade obliquely oblong, 5-13 × 2.5-4.5 cm, papery, major basal lateral veins asymmetric, 1 basal, the other arising above base, abaxial surface glabrous, adaxial surface sparsely strigillose along veins, cystoliths obscure, slightly dense; base with broader half auriculate (auricle 2-4 mm), margin dentate, apex acuminate. Male inflorescences in pairs, simple, 8-13 mm in diam.; peduncle 3-5 mm; receptacle broadly elliptic, 4-9 × 3-7 mm; bracts obscure; bracteoles broadly linear or linear. Male flowers 4-merous. Fl. Aug.

* Forests along rivers; ca. 400 m. NW Hunan.