贡山楼梯草 gong shan lou ti cao

Herbs perennial, monoecious or dioecious, 12-15 cm tall. Stems ascending or erect, simple or 1-branched, pubescent. Leaves alternate; nanophylls absent; stipules linear, ca. 2 × 0.4 mm, glabrous, with cystoliths; petiole 0-0.8 mm; leaf blade obliquely elliptic, 2-4.5 × 0.5-2 cm, herbaceous, major basal lateral veins asymmetric, 1 basal, the other arising above base, abaxial surface strigillose, adaxial surface sparsely strigose, cystoliths conspicuous, sparse; base with broader half obtuse, margin denticulate, apex caudate-acuminate. Male inflorescences solitary, simple, 2-3 mm in diam.; peduncle 20-23 mm; receptacle obscure; bracts connate, ca. 2.8 mm; bracteoles linear. Female inflorescences solitary, 30-flowered or more, 2-3 mm in diam.; peduncle 0-0.3 mm; receptacle 0.8-2 mm in diam.; bracts triangular; bracteoles broadly linear or linear-spatulate. Male flowers 4-merous. Fl. Jun.

* Evergreen broad-leaved forests, rocks; 2400-2600 m. E Xizang, NW Yunnan.