Annual short-lived herbs or sometimes perennial and ±shrubby, with short-stalked T-shaped asymmetric or symmetric hairs. Leaves simple, alternate, shortly petiolate. Capitula cylindric-campanulate, hemispherical to depressed globose or ovoid, pedunculate, in terminal cymose panicles; involucral bracts herbaceous, 3–4 (–5)-seriate, ovate, acute to acuminate, purplish on margins and apices; receptacle flat, alveolate, epaleate. Florets bisexual, actinomorphic, tubular, 15–90 (–95) per capitulum; corolla 5-lobed, with straight hairs; anthers sagittate below, without tails or appendages, non-glandular; style with node below subulate branches. Achenes obovoid-terete, mostly 5-ribbed, hairy or glabrous, with idioblasts. Pappus bristly or scaly, 1–2-seriate; outer row of bristles or scales sometimes absent, shorter than inner row, ±fused into a corona or callose ring, fimbriate; inner row usually of terete, white, deciduous bristles.
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