Plants 50-140(-180) cm. Stems glabrous. Leaves: basal oblance-olate to obovate, mostly 9-50 cm; proximal cauline well developed, gradually reduced distally, clasping, faces not gland-dotted. Heads in flat-topped, corymbiform arrays. Peduncles glabrous. Involucres 3.5-5 mm. Phyllaries 5-12 in 1-2(-3) series, oblanceolate, gland-dotted, apices obtuse. Receptacles epaleate or partially paleate (paleae 1-2). Corollas glandular, lobes 0.8-1 mm. Cypselae glandular; pappus bristles in ± 1 series.