Annual, green, sparingly mealy, 25-70 cm. Stems ascending to erect, branched, more or less angular. Leaves usually 3-7 x 2-4 cm., petiolate, rhombic-ovate to rhombic-oblong, cuneate at base, acute to acuminate at apex, irregularly serrate-dentate with acute teeth, glabrous or somewhat mealy mainly on lower surface. Inflorescences axillary and terminal, paniculate, divaricately branched, with dense or loose clusters. Flowers hermaphrodite. Tepals 5, green, keeled, more or less enclosing fruit. Pericarp hyaline, papillate, hardly separable from seed. Seeds 1-1.5 mm. in diam., keeled at margin, minutely pitted, testa with vertical stalactites. Fl. February-September.