Annual or perennial, often prostrate herbs. Leaves alternate, pinnatifid. Capitula terminal or leaf-opposed, solitary or laxly corymbose, globose, disciform; phyllaries 1–3-seriate, subequal, the inner with membranous margins; receptacle hemispheric or conical, epaleate. Outer florets in 1-several rows, female, narrowly tubular, 2–4-dentate; central florets very many, hermaphrodite, 4–5-lobed; anther bases obtuse; style-branches with short triangular appendages. Achenes slightly compressed, pubescent; pappus of a few basally connate scaly bristles, a corona, or rarely absent.
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