Plants caulescent, 30-200 cm; fibrous rooted. Stems terete, glabrous, hirsute, hispid, or scabrous. Leaves: basal persistent or caducous, petiolate or sessile; cauline alternate, opposite, or whorled, petiolate or sessile; blades simple, lanceolate, falcate, or ovate, 1.5-25 × 0.5-5 cm, bases attenuate to round, margins dentate, serrate, or entire, apices acuminate, acute, or obtuse, faces glabrous, hirsute, hispid, or scabrous. Phyllaries 12-26 in 2-3 series, outer appressed or reflexed, apices acute to acuminate, abaxial faces hispid or scabrous. Ray florets 8-21; corollas yellow. Disc florets 35-150; corollas yellow. Cypselae 6-15 × 4-11 mm; pappi 0-5 mm.