勐仑楼梯草 meng lun lou ti cao

Herbs perennial, dioecious, 14-18 cm tall. Stems ascending or erect, branched, puberulent or villosulous. Leaves alternate; nanophylls absent; stipules lanceolate to lanceolate-linear, 4-8 × 1.6-2.2 mm, ciliate, without cystoliths; petiole 0.8-4 mm; leaf blade obliquely oblong or elliptic, 2.5-12 × 2-3 cm, herbaceous, major basal lateral veins asymmetric, 1 basal, the other arising above base, abaxial surface pubescent along nerves, adaxial surface strigose, cystoliths obscure, sparse; base with broader half subcordate, margin dentate, apex cuspidate or caudate. Male inflorescences solitary, simple, ca. 7 × 4 mm; peduncle 1-1.5 mm; receptacle oblong, ca. 6 × 4 mm; bracts connate, 7-9 mm; bracteoles oblong. Male flowers 4-merous. Fl. Jun.

* Rocks under rain forests in valleys; ca. 700 m. Yunnan (Mengla).