Description from Flora of China
Herbs perennial, robust, or subshrubs, stoloniferous, dioecious. Stems much branched, to 120 cm tall; upper stems, branches, petioles, and inflorescence with multicellular pubescence. Stipules deciduous, deltoid or subcordate, 1.5-2.5 mm; petiole strongly unequal in length, 0-2 cm; leaf blade brownish when dry, the major blade oblong-oblanceolate, slightly asymmetric, strongly unequal in shape and size; 8-12 × 2.3-3.5 cm; submembranous, 3-veined, lateral veins many, subtransverse, reticulate, abaxial surface sparsely setose, with dense multicellular hairs on veins, adaxial surface with multicellular hairs, cystoliths minute, only at margins, base obtuse or broadly cuneate, margin serrate or crenate, apex acuminate or caudate-acuminate, acumen serrate. the minor blade rarely reduced, sessile, obovate, 6-9 × 4-6 mm. Inflorescence a compact cymose panicle, 0.8-1.5 cm, shortly pedunculate. Male flowers shortly pedicellate, ca. 1 mm; perianth lobes 4, ovate, connate 1/2 of length, apex obtuse; stamens 4; rudimentary ovary minute, conic. Female flowers ca. 0.5 mm; perianth lobes subequal, oblong, persistent, subapically corniculate. Fl. Aug-Oct.
* Shaded moist places in forests, near streams; 1800-2800 m. NW Yunnan.