Annuals, 4–30 cm. taprooted. Stems 1–50+, initially scapiform, later elongate and leafy (after rosette leaves wither), erect, eglandular or stipitate-glandular, especially near heads. Leaves initially produced basally (rosettes); later leaves cauline. sessile or petiolate; blades oblanceolate to spatulate, 1.5–18 cm, usually irregularly pinnately lobed, terminal lobes often denticulate, faces glabrous, eglandular or loosely glandular-villous; cauline (appearing opposite on late-season stems), narrowly oblanceolate to linear, mostly entire. Heads borne singly. Peduncles from rosettes (early) or axillary or terminal on stems (later). Involucres 4.5–8 mm. Phyllaries 9–15, reflexed in fruit. lanceolate, midveins obscure, apices acute. Florets 8–35; corollas yellow, often purplish abaxially, 5–12 mm. Cypselae dark reddish brown, narrowly obconic, 1.5–2.3 mm, 15–20-ribbed; pappi of 5, hyaline, rounded outer scales 0.5–1 mm plus 5, scabrous inner bristles 4–6 mm. 2n = 10, 20.
"Slender annual 3–40 dm, scapose or leafy only near the base, the several scapes or scapiform peduncles generally spreading-glandular-hairy above, sometimes throughout; lvs linear to oblanceolate or obovate, 1.5–12 cm × 1–12 mm, entire to pinnatifid, loosely villous- hirsute to glabrous, the hairs sometimes glandular; invol 4–7 mm, its (5–)9–18 bracts lanceolate or narrower, reflexed in age, not keeled or ribbed; pappus of 5 short, thin scales alternating with as many scabrous bristles several times as long; 2n=10, 20. Sandy places; Me. and Vt. to Wis., s. to Fla. and Tex. Mar.–July."