Annual, glabrous or nearly so, usually reddish, 15-80 cm.. Stems prostrate to erect, simple or branched, angular. Leaves up to 9 x 7 cm., long-petioled, much varying in size and shape, rhombic, ovate or triangular, more or less acute or acuminate, obscurely 3-lobed, sinuate-dentate, the uppermost often entire. Flower-clusters crowded in branched, axillary or terminal, generally leafless inflo¬rescences. Terminal flower of each glomerule with 3-5 almost free, strongly incurved segments and horizontal seeds; other flowers with 2-3 membranous tepals connate almost to top, with vertical seeds. Seeds about 1 mm. in diam., minutely pitted to nearly smooth, red, glossy. Fl. May-September.