Annual herbs, with short stems, glandular-hairy except on achenes. Leaves all basal, entire, toothed to deeply pinnatisect, flat, narrowly tapering at base; indumentum of felted cottony hairs mixed with longer spreading hairs, or nearly glabrous. Capitula broadly campanulate; involucral bracts free, 2–3-seriate, herbaceous throughout or with scarious margins, cottony-hairy and glandular; receptacle slightly convex, pitted, with scarious scales. Corollas yellow, sometimes purplish. Ray florets uiseriate, female, fertile; ligule 3-lobed, 4-veined. Disc florets bisexual, fertile; corolla tubular or campanulate, glandular, deeply 5-lobed; anthers sagittate at base, not tailed, with apical appendage ovate; style minutely pubescent about a slight swelling 1/3 below apex; style branch apices rounded in ray florets, obtuse in disc florets, smooth. Achenes asymmetrically oblong to obovoid, ridged, ribbed or grooved on adaxial side, glabrous or minutely pubescent. Pappus absent.
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