Herbs 40-100 cm tall, biennial. Stem simple or branched from lower or middle third, glabrous. Basal and lower cauline leaves linear to lanceolate, 15-35 × 0.3-0.7 cm. Capitula solitary to few; peduncle inflated, 0.7-1.5 cm in diam. Involucre 6.5-9 cm. Phyllaries 8-12(-14), longer than florets and equaling or 1/4 longer than achenes with pappus. Ligules yellow. Outer achenes 3-3.5 cm; body pale brown, ± curviform, 1.4-1.8 mm in diam., with 5 fairly well-differentiated ribs, tuberculate; beak whitish, 1.5-2.2 cm, slender, non-tuberculate or toothed, apically inflated; pappus disk ± tomentulose. Pappus dirty white, 2.5-3.5 cm. Fl. and fr. Apr-Jun. 2n = 12.
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