显苞楼梯草 xian bao lou ti cao

Herbs perennial, dioecious, ca. 26 cm tall. Stems ascending or erect, simple, glabrous. Leaves alternate; nanophylls absent; stipules linear, 6-7 × 1.5-2 mm, glabrous, without cystoliths; petiole absent; leaf blade obliquely elliptic or obovate-elliptic, 5-15 × 2.5-5.5 cm, herbaceous, major basal lateral veins absent and venation pinnate, abaxial surface sparsely puberulent along veins, adaxial surface sparsely strigillose, cystoliths obscure, dense; base with broader half nearly cordate, margin densely dentate, apex cuspidate or caudate-acuminate. Female inflorescences solitary or in pairs, 30-flowered or more, 3-5 mm in diam.; peduncle ca. 1 mm; receptacle small; bracts narrowly triangular or linear; bracteoles linear. Achenes ellipsoid, 4-ribbed. Fl. May.

* Dark damp places in valleys; 400-500 m. N Guizhou.