河口楼梯草 he kou lou ti cao

Herbs perennial, monoecious, ca. 70 cm tall, glabrous. Stems erect, branched. Leaves alternate; nanophylls absent; stipules narrowly triangular-linear or subulate, 3.4-4.5 × 0.3-0.5 mm, without cystoliths; petiole 0-7 mm; leaf blade oblong-obovate, or oblong, 6.5-16.5 × 2-5 cm, herbaceous, major basal lateral veins asymmetric, 1 basal, the other arising above base, cystoliths conspicuous or obscure, dense; base obliquely cuneate, margin obtusely denticulate, apex acuminate. Male inflorescences solitary, simple, ca. 5 × 4.5 mm; peduncle ca. 75 mm; receptacle elliptic, ca. 3 × 2.5 mm; bracts connate, bracteoles broadly linear. Female inflorescences solitary, 1.5-2 mm in diam.; peduncle 0.5-1 mm; receptacle nearly orbicular, 1-1.5 mm in diam.; bracts triangular; bracteoles spatulate. Male flowers 5-merous. Fl. Jun.

* Densely forested slopes; 100-200 m. Yunnan (Hekou).