Erect, decumbent or prostrate annual, mostly up to 45 (rarely 70) cm, branched from the base and usually above. Stem slender to stout, glabrous or thinly to moderately furnished with short to long, often crisped multicellular hairs. Leaves long-petiolate, the petiole sometimes longer than the 4–55 x 2–30 mm, broadly or rhomboid-ovate to narrowly linear-lanceolate blade, glabrous or somtimes with sparse short gland-like hairs on the lower surface, acute to obtuse or obscurely retuse. Flowers entirely in axillary clusters, male and female flowers intermixed. Tepals of female flowers 3, 1.5–2 mm, lanceolate-oblong to linear-oblong, gradually to abruptly narrowed to the mucro. Stigmas 3. Capsule subglobose to shortly ovoid, 2–2.5 mm, usually strongly wrinkled throughout with a very short, smooth beak, longer than the perianth, circumscissile or sometimes not, even on the same plant. Seeds lenticular, faintly reticulate.