近羽脉楼梯草 jin yu mai lou ti cao

Herbs perennial, dioecious, ca. 42 cm tall. Stems ascending or erect, branched, glabrous. Leaves alternate; nanophylls absent; stipules narrowly linear, 3-5 × 0.8-1 mm, glabrous; petiole 0-1 mm; leaf blade obliquely oblong, 7-11 × 2-4 cm, nearly papery, major basal lateral veins ± absent and venation pinnate, abaxial surface glabrous, adaxial surface sparsely puberulent, cystoliths conspicuous or obscure, sparse; base with broader half auriculate, margin dentate, apex acuminate. Male inflorescences solitary, simple; peduncle 90-100 mm; receptacle elliptic; bracts connate, 3-4 mm; bracteoles narrowly linear. Male flowers 5-merous. Fl. Jul.

* Mountain streamsides; ca. 1000 m. S Sichuan.