Description from Flora of China
Herbs perennial, stoloniferous, glabrous, dioecious. Stems 20-40 cm tall, succulent distally, woody at base, swollen between nodes. Stipules membranous, triangular, ca. 1 mm, persistent; petiole unequal in length, 1-4 cm; leaf blade abaxially pale green, adaxially dark green, lanceolate or oblong-lanceolate, sometimes asymmetric, unequal in size, 6-14 × 2.5-4 cm, membranous, 3-veined, lateral veins many, transverse, cystoliths fusiform often arranged along secondary veins, conspicuous abaxially, base rounded or subcordate, margin shallowly undulate-crenate, with a ciliate tip of teeth from hollow, apex caudate-acuminate. Male inflorescence not seen. Female inflorescence solitary, a paniculate cyme, 5-11 cm, pedunculate. Female flowers subsessile, in bud ca. 1 mm; perianth lobes connate at base, subequal, abaxial lobe large, subapically ± corniculate; staminodes 3, scale-like, oblong. Achene brownish, broadly ovoid, ca. 2 mm, compressed, not oblique, often minutely purplish spotted, enclosed by equal perianth lobes. Fr. Sep.
* Shaded wet places of Pinus forests; 1500-1600 m. SE Xizang.