Perennial herb with a rosette of radical leaves and one or more erect unbranched or less often once-branched flowering stem(s) 2–30(–38) cm high, bearing few short linear cauline leaves; stem ribbed, hollow, with white latex, glabrous or with sparse dark glandular setae on the ribs, distally (rarely all over) with some short white pubescence; root thick, sometimes divided.. Leaves: radical leaves appressed to the ground, oblanceolate or narrowly obovate, 2–10(–15) cm long, 0.3–2.5 cm wide, base attenuate, margins subentire to recurved-dentate to pinnately lobed, apex rounded and mucronate, glabrous or with sparse hairs on midrib and veins; cauline leaves few or sometimes absent, linear, 1–3 cm long, 1–2 mm wide (larger and more like basal leaves at branching point in 2-headed plants), the most proximal sometimes with a few teeth, attenuate, glabrous or with sparse dark setae.. Capitula solitary, less often in pairs; involucre 7–14 mm long; phyllaries lanceolate, the outer 3–4 mm long, the inner 7–14 mm long, acute, proximally with short white pubescence, along the midrib subglabrous or with sparse to dense black glandular setae.. Corolla (lemon) yellow (once described as white), tube cylindric to slightly widened distally, 3–4 mm long, glabrous, ligule 4.5–8 mm long, 1.2–1.5 mm wide; central florets open later, and buds have been called tubular florets.. Achenes fusiform, 5–6.5 mm long, slightly tapered distally, the ribs with antrorse hairs; pappus 4.5–6 mm long.
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