Plants herbs, erect, annual, (1.5) 2–4 dm tall, glabrous, greenish to grayish; stems with caudex absent, the aerial flowering stems erect, solid, not fistulose, 0.3–2 dm long, glabrous; leaves basal, the petioles 1–3 (5) cm long, floccose, the blades cordate to orbiculate, (0.5) 1–3 (5.5) cm long, (0.5) 1–3 (5) cm wide, densely white- tomentose abaxially, less so to subglabrous and grayish to greenish adaxially, the margins entire; inflorescences cymose, diffuse, of many horizontal tiers of flat-topped branches, 10–35 cm long, 5–35 cm wide, the branches glabrous, the bracts 3, scalelike, 1–3 mm long, 0.5–1.5 mm wide; peduncles absent; involucres deflexed, narrowly campanulate, 1–1.5 mm long, 1.5–2 mm wide, glabrous, the teeth 5, erect, 0.4– 0.7 mm long; flowers 1.3–1.5 mm long, the perianth white with greenish midribs, becoming reddish, glabrous, the tepals dimorphic, those of outer whorl narrowly oval to cordate, those of inner whorl narrowly lanceolate, the stamens included, 1–1.3 mm long, the filaments glabrous; achenes dark brown, lenticular, 1.3–1.5 mm long, glabrous. 2n = 40.