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.
genus with 80 species, mainly distributed in South and Central America but several species in Africa and Asia. Represented in Pakistan by 3 species.