Annual, rarely biennial or perennial herbs with simple, sessile, ± clasping or decurrent leaves. Capitula disciform in small, loose terminal corymbs; phyllaries multiseriate, scarious, yellowish, whitish or sometimes brownish, stereome divided. Receptacle flat, naked. Outer florets female, many, outnumbering the central ones, filiform, corolla yellow; central florets bisexual, few, tubular, corolla yellow, 5-lobed. Cypselas ± oblong, glabrous, papillose or sparsely hairy with short clavate myxogenic twin hairs; pappus simple, setae slender, free or partly coherent at base, deciduous, apical cell subclavate.