Herbs, spreading, annual, 0.5-4 dm, glandular, greenish. Stems: caudex absent; aerial flowering stems erect, solid, not fistulose, 0.2-0.7 dm, glandular. Leaves basal; petiole 1-4 cm, tomentose; blade orbiculate to cordate, 1-3(-5) × (1.5-)2-5 (5.5) cm, densely white-tomentose abaxially, less so to subglabrous and green adaxially, margins usually smooth. Inflorescences cymose, open to rather diffuse, often flat-topped, 3-40 × 3-100 cm; branches glandular; bracts scalelike, 1-3 × 0.5-1.5 mm. Peduncles absent or deflexed, straight, stoutish, 0.1-1.5 cm, glandular. Involucres turbinate to campanulate, 1-2.5 × 1.5-2.5 mm, glandular; teeth 5, erect, 0.3-1 mm. Flowers 1-2.5 mm; perianth white with greenish or reddish midribs, becoming reddish, glabrous; tepals dimorphic, those of outer whorl ovate to oblong and often auriculate proximally, those of inner whorl usually lanceolate; stamens included to exserted, 1.5-2.5 mm; filaments glabrous or pilose proximally. Achenes brown to black, lenticular to 3-gonous, 1.5-2 mm, glabrous. 2n = 40.
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