绒序楼梯草 rong xu lou ti cao

Herbs perennial, dioecious, 80-100 cm tall. Stems ascending or erect, branched, densely strigose. Leaves alternate; nanophylls absent; stipules lanceolate, ca. 12 × 3.5 mm, densely pubescent on abaxial surface along costa, with cystoliths; petiole 0-1 mm; leaf blade obliquely elliptic, (5-)10-22.5 × (2.5-) 4.5-11 cm, papery, major basal lateral veins both arising at base of leaf blade, abaxial surface densely puberulent along nerves, adaxial surface glabrous or glabrescent, cystoliths conspicuous, dense; base with broader half auriculate (auricle ca. 4 mm), margin denticulate, apex caudate-acuminate. Male inflorescences in pairs, simple, 9-11 × 5-7 mm; peduncle 2-3 mm; receptacle oblong, 8-11 × 5-6 mm; bracts obscure; bracteoles cymbiform-oblong or linear. Female inflorescences in pairs, ca. 12 × 8 mm, sessile; receptacle ca. 12 × 8 mm; bracts obscure; bracteoles spatulate or spatulate-linear. Male flowers 4-merous. Fl. Feb-Mar.

* Evergreen broad-leaved forests in valleys; 700-900 m. SE Xizang.