Herbs, erect, annual, (0.5-)1-7 dm, glabrous and sparsely floccose, greenish. Stems: caudex absent; aerial flowering stems erect, solid, not fistulose, (0.3-) 0.7-3 dm, thinly floccose or glabrous, floccose proximally. Leaves basal, occasionally cauline; basal: petiole 2-6(-10) cm, floccose, blade oblong-oblanceolate to obovate, (1.5-)2-8 × (0.8-)1-3 cm, thinly floccose or glabrous and green on both surfaces, margins entire; cauline: petiole 0.5-3 cm, thinly floccose, blade elliptic to obovate, 0.7-3 × 0.2-2 cm, similar to basal blade. Inflorescences paniculate, open to diffuse, (5-)10-50 × 5-50 cm; branches not fistulose, glabrous except for floccose nodes and proximal branches; bracts 3, scalelike, 0.5-3 × 0.3-1 mm. Peduncles erect, straight, capillary, 0.5-2 cm, glabrous or thinly floccose. Involucres narrowly turbinate to turbinate, 1-1.5(-1.8) × 0.6-1.2 mm, glabrous; teeth 4, erect, 0.2-0.5 mm. Flowers 1-2.5(-3) mm; perianth white with greenish or reddish midribs to pale yellow with greenish midribs, becoming pink to reddish, densely short-villous; tepals monomorphic, oblong to narrowly ovate; stamens exserted, 1-1.5 mm; filaments glabrous. Achenes dark brown to black, 3-gonous, 1.8-2 mm, glabrous.
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