渤生楼梯草 bo sheng lou ti cao

Elatostema beshengii W. T. Wang; E. treutleri J. D. Hooker.

Herbs perennial, dioecious, 30-80 cm tall, glabrous. Stems ascending or erect, simple. Leaves alternate; nanophylls absent; stipules lanceolate-linear, 14-22 × 2-3.5 mm, with cystoliths; petiole 2-6 mm; leaf blade obliquely oblong or obliquely obovate-oblong, 8-19 × 3-7 cm, papery, major basal lateral veins 2, cystoliths conspicuous, dense; base obliquely cuneate, margin denticulate, apex acuminate. Male inflorescences solitary, simple, 14-17 × 10-12 mm; peduncle 13-25 mm; receptacle oblong or broadly elliptic, 13-15 × 5-8 mm; bracts connate, 6-10 mm; bracteoles linear. Female inflorescences solitary, 7-13 × 4-7 mm; peduncle ca. 4 mm; receptacle elliptic, 7-12 × 4-6 mm; bracts ovate or triangular; bracteoles oblanceolate-linear. Male flowers: perianth lobes 4. Achenes ellipsoid, 6-ribbed. Fl. Jan-Apr.

Evergreen broad-leaved forests in ravines; 600-1300 m. SE Xizang [N India, Sikkim].