Herbs 30-50 cm tall. Rhizome horizontal. Stem solitary, usually purplish red, unbranched. Leaves papery, green, concolorous, glabrous. Basal leaves rosulate, petiolate; leaf blade elliptic to oblanceolate, 15-21 × 3-4 cm, pinnately lobed or pinnatifid; segments triangular; lateral segments 6-9 pairs; terminal segment largest. Cauline leaves several, sessile, elliptic to lanceolate, 5-12 × 1-3 cm, pinnately lobed to pinnatipartite, apex with a long spine. Bracts pinnatipartite. Capitula 1 or 2. Involucre campanulate, 2.5-3 cm in diam. Phyllaries few, imbricate; outer phyllaries ± narrowly elliptic, 7-11 × 3-4 mm; middle phyllaries gradually longer; innermost phyllaries linear to broadly linear, ca. 21 × 3 mm. Corolla yellow, ca. 1.3 cm. Achene obovoid, ca. 6 mm. Pappus white, 7-8 mm. Fl. and fr. Sep.
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