酉阳楼梯草 you yang lou ti cao

Herbs perennial, monoecious, ca. 20 cm tall, glabrous. Stems ascending or erect, simple, glabrous. Leaves alternate; nanophylls absent; stipules subulate, 1-1.5 × 0.1-0.2 mm, without cystoliths; petiole absent; leaf blade oblong-lanceolate, 4.5-7 × 1.5-2 cm, papery, major basal lateral veins absent and venation pinnate, cystoliths obscure, dense; base with broader half cordate, margin dentate, apex caudate. Male inflorescences solitary, simple, 2-6 mm in diam.; peduncle 3-15 mm; receptacle very small; bracts connate, ca. 2 mm; bracteoles lanceolate-linear. Female inflorescences solitary, 30-flowered or more, 1-1.6 mm in diam.; peduncle ca. 0.5 mm; receptacle small; bracts broadly ovate; bracteoles cymbiform. Male flowers 5-merous. Fl. Apr.

* Mountains; ca. 1300 m. Chongqing (Youyang).