算盘楼梯草 suan pan lou ti cao

Herbs perennial, dioecious, ca. 25 cm tall. Stems ascending, branched, ferruginous-furfuraceous, glabrous. Leaves alternate; nanophylls absent; stipules narrowly triangular, ca. 0.6 × 0.2 mm, glabrous; petiole 0-0.8 mm; leaf blade lanceolate, oblong-lanceolate, narrowly ovate, or elliptic, 1.1-3 × 0.4-0.9 cm, papery, major basal lateral veins both arising at base of leaf blade, abaxial surface glabrous, adaxial surface strigillose along veins, cystoliths conspicuous, dense; base with broader half rounded or auriculate, margin entire, apex attenuate or acute. Female inflorescences solitary, 2.5-4 mm in diam.; peduncle ca. 0.5 mm; receptacle small, ca. 1.8 mm in diam.; bracts connate, triangular; bracteoles linear-oblanceolate or linear. Achenes nearly ovoid, 7-ribbed. Fl. Apr.

* Mountain forests; ca. 800 m. Guizhou (Libo).