Herbs, erect to spreading, annual, (0.5-)1-10(-20) dm, glabrous, occasionally glaucous, greenish to grayish. Stems: caudex absent; aerial flowering stems erect, solid or occasionally hollow and fistulose, 0.3-3(-4) dm, glabrous, occasionally glaucous. Leaves basal; petiole 1-7 cm, usually floccose; blade cordate to reniform or nearly orbiculate, 1-2.5(-4) × 2-4(-5) cm, densely white-tomentose abaxially, less so to floccose or subglabrous and grayish to greenish adaxially, margins entire. Inflorescences cymose, open to diffuse, flat-topped, spreading, hemispheric or narrowly erect and strict with whiplike branches, 10-90(-180) × 5-50 cm; branches glabrous, occasionally glaucous; bracts 3, scalelike, 1-3 × 0.5-1.5 mm. Peduncles absent or deflexed, rarely some ± erect distally, straight, slender to stout, 0.1-1.5 cm, glabrous. Involucres narrowly turbinate to turbinate, 1.5-2.5(-3) × 1-2.5 mm, glabrous; teeth 5, erect, (0.2-)0.5-1 mm. Flowers 1-2.5 mm; perianth white to pink, with greenish to reddish midribs, becoming pinkish to reddish, glabrous; tepals dimorphic, those of outer whorl oblong or cordate to ovate, those of inner whorl lanceolate to narrowly ovate; stamens included, 1-1.5 mm; filaments glabrous or sparsely pilose proximally. Achenes brown to dark brown, 3-gonous, (1.5-)2-3 mm, glabrous.
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