Annuals, rarely biennials; taproots 2–10+ cm. Stems 1–3, usually branched in distal 1/2, sometimes throughout, moderately stout to stout, not wiry, mostly glabrous. Leaves: basal (if persisting) 50–80 × 15–25 mm, pinnatifid, rarely 2-pinnatifid; cauline evenly spaced, proximal often spatulate, distal 2/3 narrowly to broadly lanceolate, 5–35 × 8–12 mm, markedly reduced distally, margins of proximal pinnatifid to coarsely serrate, of distal minutely, evenly serrulate or entire and antrorsely ciliolate, teeth or cilia 50–90+ per side, teeth tipped by white seta 0.1–1.5 mm, faces glabrous. Peduncles moderately to densely hispidulous, eglandular; usually ebracteate. Involucres hemispheric, 5–10 × 11–20 mm. Phyllaries in 3–4 series, faces glabrous; outer usually 1.5–8.5 × 2–5 mm, ciliate; inner 2–10.5 × 1.5–4 mm, often ciliate. Ray florets 12–34; corollas yellow, tubes 2.5–3 mm, laminae 5–18 × 2–3 mm. Disc florets 50–200+; corollas 4.5–5 mm. Cypselae 1.6–1.8 mm; pappi 5–6.5 mm, outer lengths often 0.5 longest.