褐脉楼梯草 he mai lou ti cao

Herbs perennial, dioecious, ca. 65 cm. Stems ascending, branched, villous. Leaves alternate; nanophylls absent; stipules broadly lanceolate, 15-20 × 4.5-5.2 mm, glabrous, with cystoliths; petiole 1.5-2 mm; leaf blade obliquely obovate or broadly oblanceolate, 6.5-9 × 2.5-4 cm, papery, major basal lateral veins asymmetric, 1 basal, the other arising above base, abaxial surface puberulent, adaxial surface sparsely strigose, cystoliths obscure, sparse; base with broader half auriculate, margin denticulate or dentate, apex acuminate or cuspidate. Male inflorescences solitary, simple, ca. 5 mm in diam.; peduncle 5-10 mm; receptacle obscure; bracts connate, 3-6 mm; bracteoles oblong or linear-cymbiform. Male flowers 4-merous. Fl. Jun.

* Forests on limestone slopes; ca. 1300 m. W Guangxi.