Herbs perennial, stoloniferous, monoecious or dioecious. Stems often branched, 25-70 cm tall, pubescent distally. Stipules oblong, 3-9 mm, membranous, apex obtuse; petiole 2-8 cm, sparsely pubescent; leaf blade unequal in same pair, ovate to lanceolate, 4-15 × 2-6.5 cm, 3-veined, lateral basal pair often unequal, 1 reaching to middle, anastomosing with adjacent secondary veins before margin, other reaching to tooth of distal margin, lateral veins numerous, sparsely hirsute adaxially, sparsely pubescent on veins abaxially, base slightly obliquely rounded, rarely broadly cuneate, margin dentate-serrate, apex usually acuminate; cystoliths linear, conspicuous on both surfaces. Male inflorescences capitate, receptacle discoid, 8-35 mm in diam.; peduncle 5-30 cm. Female inflorescences on discoid receptacles 5-10 mm in diam.; peduncle 3-12 cm; involucral bracts in 1 or 2 rows, ovate or triangular, ca. 1 mm, membranous. Male flowers pedicellate; perianth lobes 5, unequal, obovate-oblong, corniculate below apex; stamens 5; rudimetary ovary minute, conic. Female flowers shortly pedicellate: perianth lobes (3 or)4(or 5), subequal or lobes by the margin of discoid receptacle unequal, oblong-obovate, 2 lobes corniculate below apex; staminodes conspicuous, elliptic-oblong, ca. 0.8 mm. Achene brownish gray, ellipsoid-ovoid, 0.8-1 mm, U-shaped elevated appendix along dorsi-ventral edge, verrucose. Fl. Jul-Oct, fr. Sep-Nov.
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A weak herb. The leaves have stalks. They are opposite and 1.8-15 cm long by 1-6 cm wide. They are oval and taper to the tip. They have teeth around the edge. The flowers are green. They are on a long stalk. These are in the axils of leaves. The flower receptacle is saucer shaped.
Inflorescences on peduncles 0.5–1 cm. long; male inflorescences campanulate, up to 3 mm. in diam., females discoid up to 6 mm. in diam.
Leaves 1–1.5 x 0.5–1 cm., ovate, apex acuminate, base cuneate, margin serrate, almost glabrous above, puberulous below.
Annual herbs to 10 cm. tall, with juicy stems branched from the lower nodes, hairs short, stiff.
Female flowers pedicellate or sessile, up to 0.8 mm. long.
Male flowers pedicellate, c. 0.5 mm. in diam.
Petioles up to c. 1 cm. long.
A subtropical plant. In Nepal it grows between 1200-3000 m altitude. It is common in wet and shady places. In China it grows in moist places in forests between 1,300-2,700 m above sea level. In Sichuan and Yunnan.
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