四被楼梯草 si bei lou ti cao

Herbs perennial, dioecious, 50-56 cm tall. Stems ascending or erect, usually simple, strigose. Leaves alternate; nanophylls ovate, 4-5 mm; stipules lanceolate-linear, 14-16 × 2-3 mm, glabrous, with cystoliths; petiole 0-2.5 mm; leaf blade obliquely elliptic or narrowly elliptic, 5.5-20 × 3.5-10.5 cm, herbaceous, major basal lateral veins asymmetric, 1 basal, the other arising above base, abaxial surface strigillose along veins, adaxial surface glabrous, cystoliths conspicuous, dense; base with broader half broadly cuneate or nearly auriculate, margin dentate, apex acuminate. Female inflorescences solitary, 11-17 × 9-12 mm, subsessile; receptacle nearly elliptic, 10-15 × 10 mm; bracts triangular; bracteoles linear-lanceolate. Achenes ovoid, 6-ribbed. Fl. Jul.

* Mountain forests; ca. 700 m. SE Xizang.