Slender, erect annual, 10-30 cm. high, the stem simple, glabrous; stipules very small, soon deciduous; leaves rhombic-elliptic or ovate, 1-4 cm. long, 0.8-2.5 cm. wide (extremes up to 6 X 4 cm.), acute at apex, cuneate at base, serrate except toward the base, thin-membranous, glabrous, or sparsely hyaline-strigose above; plants monoecious, the inflorescences androgynous, cymose-paniculate, shorter than the petioles, borne at nearly every node, the staminate flowers relatively few; achenes suborbicular, not more than 0.5 mm. long.
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