背崩楼梯草 bei beng lou ti cao

Subshrubs, dioecious, 40-80 cm tall, glabrous. Stems ascending or erect, branched. Leaves alternate, glabrous; nanophylls absent; stipules subulate, 1.5-2.5 × 0.2-0.3 mm, without cystoliths; petiole 0-2.5 mm; leaf blade obliquely elliptic or oblong-rhombic, 3.5-8.5 × 1.5-3 cm, papery, major basal lateral veins both arising at base of leaf blade, cystoliths absent; base with broader half obtuse, margin dentate, apex caudate or caudate-acuminate. Male inflorescences solitary, simple, ca. 4 mm in diam.; peduncle ca. 0.5 mm; receptacle obscure; bracts connate, 2-3 mm; bracteoles cymbiform or linear. Female inflorescences solitary, ca. 4 mm in diam., subsessile; receptacle ca. 2 mm in diam.; bracts spatulate-linear; bracteoles narrowly linear. Male flowers 5-merous. Fl. May.

* Evergreen broad-leaved forests in valleys, Pinus bhutanica forests; 1700-2100 m. SE Xizang.