Annuals, biennials, or short-lived perennials, 4-80 cm; fibrous-rooted, caudices simple. Stems erect (green proximally, leafy to arrays), hirsuto-villous to villous proximally, loosely strigose to sparsely hirsute distally, minutely glandular. Leaves basal (persistent or withering by flowering) and cauline; basal blades oblanceolate to obovate, (15-)30-110(-150) × 10-25(-40) mm, margins shallowly crenate to coarsely serrate or pinnately lobed, faces sparsely hirsute to villous, eglandular; cauline blades oblong-oblanceolate to lanceolate, gradually reduced distally (bases clasping to auriculate-clasping). Heads (1-)3-35 usually in corymbiform arrays (ultimate branches arising near stem tips). Involucres 4-6 × 6-15 mm. Phyllaries in 2-3 series (sometimes basally connate), hirsuto-villous to sparsely hirsute or glabrous, sometimes minutely glandular. Ray florets 150-250(-400); corollas usually white, sometimes pinkish, 5-10 mm, laminae not coiling or tardily coiling. Disc corollas 2.1-3.2 mm. Cypselae 0.6-1.1 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 15-20(-30) bristles.