紫麻楼梯草 zi ma lou ti cao

Subshrubs dioecious, 100-160 cm tall, glabrous. Stems erect, branched. Leaves alternate; nanophylls absent; stipules subulate, ca. 0.6 × 0.1 mm, without cystoliths; petiole 0.5-1 mm; leaf blade obliquely ovate, narrowly rhombic, or broadly lanceolate, 4-8 × 1.5-2.5 cm, leathery, major basal lateral veins asymmetric, 1 basal, the other arising above base, cystoliths obscure, dense; base obliquely cuneate, margin crenate, apex acuminate. Male inflorescences 2- or 3-clustered, simple, 4-5 mm in diam., sessile; receptacle obscure; bracts connate, 1.5-2 mm; bracteoles cymbiform-ovate or narrowly ovate. Fl. Feb.

* Mountain forests; 1500-1600 m. W Yunnan.