Annual, biennial or perennial herbs. Leaves alternate, petiolate, simple, pubescent. Capitula usually solitary, axillary or terminal, discoid, heterogamous; involucre mostly campanulate; bracts 3-seriate; outer bracts herbaceous towards apex; inner bracts coriaceous to scarious; receptacle honeycombed, epaleate, flat or convex. Outer florets female, in several rows; corolla tubular, yellow. Inner florets bisexual; corolla tubular with funnel-shaped limb, 5-lobed, yellow; anthers tailed; style branches linear-spathulate, obtuse. Achene ellipsoid, narrowed above into a neck, prominently ribbed, glabrous, with sessile spherical glands. Pappus absent.
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