Annual, evil smelling, with mealy indumentum, 10-50 (-100) cm. Stems ascending to erect or prostrate, branched. Leaves mostly 0.5-3 x 0.5-3 cm., petiolate, rhombic- or deltoid-ovate, entire or with 2 small lateral lobes near base of lower leaves, mealy especially beneath. Flower-clusters all of hermaphrodite flowers or with a few pistillate ones, leafless, arranged in raceme-like, axillary and terminal inflorescences. Perianth segments about 1 mm, united at base to third of their length, not keeled or with small one, mealy. Filaments dilated at base into a very short ring. Pericarp thin, finely papillose, its cells with brown or blackish content. Seeds 1-1.5 mm in diam. Fl. April-October.