Herbs, spreading, annual, 0.5–4 dm, glabrate, glabrous or sparsely glandular, greenish, grayish, or reddish. Stems: caudex absent; aerial flowering stems erect, solid, not fistulose, 0.3–1 dm, often sparsely tomentose and glandular proximally. Leaves basal; petiole 1–3 cm; blade oblong to narrowly ovate, 0.8–4.5 × 0.5–3 cm, densely white-tomentose abaxially, floccose or glabrous and greenish adaxially, margins often crenulate. Inflorescences cymose, mostly diffuse, 5–30 × 5–50 cm; branches sparsely glandular to glabrate or glabrous; bracts 3, scalelike, 1–2.5 × 1–2.5 mm. Peduncles erect, straight, capillary, 0.5–2.5 cm, glabrous and glandular-puberulent distally. Involucres broadly turbinate, 1.8–2 × 1.8–2 mm, minutely glandular-puberulent; teeth 5, erect, 0.4–0.6 mm. Flowers 1–1.7 mm; perianth white with greenish or reddish midribs, becoming red, glandular-puberulent with a tuft of long white hairs adaxially; tepals dimorphic, those of outer whorl broadly pandurate or flabellate, those of inner whorl oblanceolate; stamens included, 0.7–1.2 mm; filaments mostly glabrous. Achenes brown to black, usually lenticular, 0.6–0.8 mm, glabrous. 2n = 40.
