刀叶楼梯草 dao ye lou ti cao

Herbs perennial, dioecious, 11-30 cm tall. Stems ascending or erect, simple or branched, ferruginous-furfuraceous, glabrous. Leaves alternate, glabrous; nanophylls absent; stipules linear-lanceolate, 3-4.5 × 0.6-0.8 mm, without cystoliths; petiole 0-1 mm; leaf blade obliquely linear-oblanceolate, 1-3.2 × 0.5-1.2 cm, papery, major basal lateral veins both arising at base of leaf blade, cystoliths conspicuous, dense; base with broader half auriculate, margin dentate, apex short cuspidate. Male inflorescences solitary, simple, ca. 3 mm in diam., sessile; receptacle absent; bracts connate, bracteoles ovate. Female inflorescences solitary, 30-flowered or more, 2.5-5 mm in diam., sessile; receptacle ca. 3 mm in diam.; bracts triangular; bracteoles spatulate-oblanceolate. Male flowers 4-merous. Achenes ellipsoid, 8-ribbed. Fl. Jun.

Mixed forests in mountains; 2200-2300 m. SE Xizang [Bhutan].