Herbs annual, 0.4-2.2 m tall. Stem erect, sparsely branched above, stout, light yellow or purple ribbed, glabrous or sparsely farinose. Petiole 2-7 cm; leaf blade fresh green on both surfaces, broadly ovate to ovate-triangular, 6-15 × 5-13 cm, glabrous or slightly farinose, base rounded, truncate, or subcordate, margin palmately lobed to deeply erose-dentate, apex acute or acuminate; lobes in 2 or 3 pairs, unequal, apex usually acute to acuminate; upper leaves smaller, leaf blade mostly triangular-hastate, margin with a few lobelike teeth, sometimes subentire. Flowers bisexual and female, usually several per glomerule, these arranged in spreading panicles on upper branches. Perianth segments 5, narrowly ovate, abaxially keeled, slightly farinose, margin membranous, apex obtuse. Stamens 5. Utricle lenticular; pericarp white dotted, membranous, adnate to seed. Seed horizontal, black, not lustrous, of same shape as utricle, usually 2-3 mm in diam., distinctly orbicular pitted; embryo annular. Fl. and fr. Jul-Sep.
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An upright herb. It grows 20-220 cm tall. It has many branches. The small branches are angular. The leaves are broadly oval or triangle shaped. They are 6-17 cm long and 5-13 cm wide. The flowers are green. They occur as several together in a loose group. The seed in black and 2-3 mm across.
It is a temperate plant. It grows in forest margins, slopes, brush, valley margins. In Sichuan.
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Rocky woods, thickets, clearings and waste places in N. America.
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