Herbs, erect or slight spreading, annual, 1-5(-7) dm, mostly glabrous, usually greenish. Stems: caudex absent; aerial flowering stems erect, solid, not fistulose, (0.2-)0.5-1.5 dm, glabrous except floccose to glabrescent proximally. Leaves basal; petiole (1-)2-6 cm, mostly floccose; blade reniform to orbiculate, (0.3-)1-3.5(-4) × (0.3-)1-4(-5) cm, densely white-tomentose abaxially, hirsute to floccose or glabrous and greenish adaxially, margins plane. Inflorescences cymose, open to somewhat diffuse, 5-40(-50) × 5-35 cm; branches glabrous; bracts 3, scalelike, 1-3 × 1.5-2.5 mm. Peduncles erect or nearly so, straight, filiform, 0.5-2.5 cm, glabrous or rarely floccose at or before anthesis. Involucres turbinate, 0.5-1 × 0.6-0.9 mm, glabrous; teeth 5, erect, 0.2-0.4 mm. Flowers 0.6-1.6(-2) mm; perianth white to rose or rarely yellowish, glabrous or puberulent to sparsely hirsute; tepals monomorphic, lanceolate to spatulate or elliptic to ovate; stamens included to slightly exserted, 0.7-1.4 mm; filaments glabrous. Achenes light to dark brown, 3-gonous, 1.7-2 mm, glabrous.
Home