Herbs perennial, stoloniferous, dioecious. Stems erect, simple or branched, ca. 50 cm tall, succulent, with gall-like swellings between nodes; stems, petioles, abaxial leaf blade, and peduncle of male cymes densely covered with villous multicellular hairs. Stipules persistent, triangular, ca. 1 mm, membranous; petiole subequal in length, 1.5-7 cm; leaf blade ovate or narrowly ovate, slightly asymmetric, subequal in size, 9-13 × 4-7.6 cm, membranous, 3-veined, lateral veins many, regularly reticulate, abaxial surface subglabrous, cystoliths fusiform, conspicuous along veins abaxially, base subrounded or broadly cuneate, margin shallowly crenate. Inflorescences in pairs; male cymes ca. 1 cm; bracts narrowly ovate, ca. 0.4 mm. Male flowers pedicellate, in bud obovoid, ca. 1.2 mm; perianth lobes 4, ovate, connate at base, subapically beaked, puberulent, stamens 4; rudimentary ovary conic. Fl. Apr.

* Shaded moist places in forests, near streams; ca. 1700 m. W Yunnan (Longling).