粗齿楼梯草 cu chi lou ti cao

Herbs perennial, dioecious, 40-50 cm tall. Stems ascending or erect, simple, sparsely puberulent. Leaves alternate; nanophylls absent; stipules linear-lanceolate, ca. 3.5 × 1.5-2 mm, puberulent on abaxial surface along costa; with cystoliths, petiole 0-2 mm; leaf blade obliquely elliptic, 6-12 × 2.5-5 cm, herbaceous, major basal lateral veins asymmetric, 1 basal, the other arising above base, abaxial surface sparsely puberulent, adaxial surface sparsely strigillose, cystoliths conspicuous, dense; base with broader half auriculate, margin dentate, apex cuspidate. Male inflorescences solitary, simple, ca. 5 mm in diam.; peduncle ca. 1 mm; receptacle very small; bracts connate, ca. 3 mm; bracteoles oblong. Male flowers 4-merous. Fl. Jul.

Mountain forests; 2400-3100 m. Xizang [Bhutan].