Subshrubs or herbs perennial, simple or few branched, 0.7-1.5 m tall; upper stems and branchlets densely appressed or patent strigose. Dioecious. Leaves opposite, subequal in size; stipules lanceolate, 0.8-1.2 mm; petiole 6-8 cm, appressed or patent strigose; leaf blade dark green or black when dry, suborbicular, orbicular-ovate, or ovate, 7-17(-26) × 5.5-13(-20) cm, papery, secondary veins 1-3 pairs along midvein, abaxial surface pubescent or sericeous along veins and veinlets, adaxial surface roughish, strigillose, base broadly cuneate, subrounded, or truncate, margin coarsely 7-14-dentate, teeth 6-20 mm, gradually larger distally, distal ones often biserrate, apex sometimes inconspicuously tricuspidate, lateral cusps shorter than terminal one. Glomerules on axillary unbranched, or sometimes few-branched, spikelike branches; male spikes 3-15 cm; female spikes 7-20(-30) cm. Male flowers 4-merous, sessile; perianth lobes elliptic, ca. 1 mm, strigose, connate at base. Fruiting perianth rhomboid-obovoid, compressed, ca. 1.8 mm, smooth, strigose on shoulder, base stipitate or cuneate, apex with short neck, 2-toothed. Fl. Jun-Aug, fr. Sep-Nov.
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A herb or small shrub. It grows up to 1.5 m tall. The leaves are opposite and unequal in size. They are round or oval and 7-17 cm long by 6-13 cm wide. There are teeth along the edge.
Very varied; growing in swamps in sandy soil; streams and moist slopes in deciduous forest, forest margins; open or shady damp ravines; thin evergreen forest; scrub in valleys; barren dry hillsides; grassland; walls and roadsides; 70-2,600 metres.
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Very varied; growing in swamps in sandy soil; streams and moist slopes in deciduous forest, forest margins; open or shady damp ravines; thin evergreen forest; scrub in valleys; barren dry hillsides; grassland; walls and roadsides; 70-2,600 metres.
In China it grows between 300-600 m in N China and 1,000-1,300 m in SW China. It grows in Yunnan.
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