Herbs, erect, annual, (0.5-)3-6(-10) dm, glabrous, glaucous, grayish. Stems: caudex absent; aerial flowering stems erect, solid, not fistulose, (0.5-)1-2 dm, glabrous. Leaves basal; petiole 1-10 cm, tomentose; blade sub-cordate to orbiculate, (1.5-)2-5(-8) × (1.5-)2-5(-8) cm, densely white-tomentose abaxially, floccose to subglabrous and green adaxially, margins often wavy. Inflorescences cymose, spreading when immature, quickly becoming narrowly erect and strict with whiplike branches, (5-)10-50(-80) × 10-50 cm; branches glabrous, glaucous; bracts 3, scalelike, 1-1.5(-2) × 0.4-1 mm. Peduncles absent or erect, straight, slender, 0.1-0.2 cm, glabrous. Involucres turbinate, 2-2.5(-3) × 1.5-2.5 mm, glabrous; teeth 5, erect, 0.5-1.5 mm. Flowers 1.5-2 mm; perianth white with green or reddish midribs, becoming pinkish, glabrous; tepals dimorphic, those of outer whorl oblong, those of inner whorl lanceolate; stamens exserted, 1.5-2.5 mm; filaments pilose proximally. Achenes dark brown to blackish, 3-gonous, 2-2.5 mm, glabrous. 2n = 40.
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