Perennial, rarely annual, rhizomatous herbs. Leaves mostly cauline, alternate, entire, toothed or pinnatisect. Capitula radiate or discoid, solitary or in lax corymbs, pedunculate; involucral bracts 2- or 3-seriate, unequal, herbaceous with scarious margins; receptacle convex to conical, naked, pitted. Ray florets usually female, 1-seriate, ligulate, white, rarely yellow or pink; style branches linear with papillose apices. Disc florets bisexual, tubular; corolla 5-lobed, yellow; anthers obtuse at base, with an ovate apical appendage; style with broad-linear, truncate branches, apices papillose. Ray and disc cypselas similar or dimorphic, obconical to cylindric, mostly 10-ribbed; pappus a minute crown, an auricle or absent.
About 33 species, from Europe, Asia and north Africa; 2 species naturalised in Australia.