拟细尾楼梯草 ni xi wei lou ti cao

Subshrubs dioecious, 25-45 cm tall. Stems ascending or erect, branched, glabrous. Leaves alternate, glabrous; nanophylls absent; stipules subulate, ca. 3 × 0.2 mm, without cystoliths; petiole 0-2.5 mm; leaf blade obliquely oblong or oblanceolate-oblong, 5-18 × 1.5-4.5 cm, papery, major basal lateral veins absent and venation pinnate, cystoliths conspicuous or obscure; base obliquely cuneate, margin dentate, apex caudate or caudate-acuminate. Male inflorescences solitary, simple, 4-7 mm in diam.; peduncle ca. 1 mm; receptacle obscure; bracts connate, 1-1.8 mm; bracteoles cymbiform-lanceolate. Female inflorescences solitary, 2.5-5 mm in diam.; peduncle 0-1 mm; receptacle 1.2-2.5 mm in diam.; bracts lanceolate-linear; bracteoles linear. Male flowers 5-merous. Achenes ellipsoid, 4-ribbed. Fl. Oct-Jan.

* Evergreen broad-leaved forests in valleys, shaded wet rocks on precipices; 1300-2400 m. SE Xizang, NW Yunnan.