Annual or short-living perennial, up to 40 cm.. Stems erect, branched from base. Leaves 1-4 x 0.7-2 cm., oval or narrowly rhombic, dentate, base truncate with petiole up to 1 cm. long, upper ones lanceolate or oblong, entire. Inflorescence leafy. Female flowers in clusters of 1-2 (-3), male flowers tiny on top of the inflorescences. Valves of female flowers spongy, turbinate or subglobose, with short wings around apex or with opposite erect circular wing-like appendages. Fl. April-November.