Annual, glabrous, glaucous, herb, 10-60 cm tall with. Branches often reddish. Leaves sessile, exstipulate, bluish-green; cauline leaves alternate, linear-oblong, rounded or a little clasping at base, acute or truncate, 2-3-dentate at apex, usually entire, 1-5 x 0.5 cm; umbel and floral leaves opposite, broad and cordate at base, long acuminate and usually recurved at apex, pectinate-serrate, broadly ovate, 1-2 x 0.5-1.5 cm. Cymes forked, pseudoumbels 3-rayed; cyathia pedicellate, glands 2-4, entire or weakly 2-horned; bracts fringed. Capsule ovoid, obscurely 3-lobed, smooth, 5-6 mm long. Seeds smooth, ovoid, with fluted caruncle shorter than the seed or sometimes ecarunculate.