Annual, erect to decumbent, up to 30 cm tall herb. Stem slender, filiform, profusely branched. Leaves with 1-3 cm long, filiform petiole lamina membranous, broadly ovate to suborbicular or rhombic-ovate 1-2 cm long and broad, thinly hairy, truncate or cuneate at the base, obtuse to acute-acuminate at the apex. Cymose flower-clusters sessile, 3-8-flowered, congested, with lower flowers bisexual and upper female. Flowers sessile, bracts linear-lanceolate, c. 2 mm long, equal to or slightly longer than the calyx, acute. Calyx 4-lobed ovate, patent, or connivent c. 1.5 mm long, acute, pilose, slightly or not enlarged in fruit. Achenes ovoid, 1-1.5 mm long, brown, shining.