Herbs, biennial or short-lived perennial, dying after flowering, 20-100 cm tall, roots long and thick; stems solitary or few, robust, unbranched below synflorescence, base covered with persistent leaf bases; most parts densely arachnoid hairy. Leaf blade to 30 × 5-6 cm, bipinnate, ultimate segments linear, to 0.6 mm wide, with cartilaginous cusp. Synflorescence umbel-like. Capitula many, long pedunculate. Involucres hemispheric, 3-5 × 6-9 mm; outer phyllaries oblong, margin broadly scarious, erose; innermost phyllaries much narrower. Florets many; corolla yellow, with linear tube and abruptly expanded campanulate limb, 5-lobed, strongly glandular papillate. Achenes cylindric, 1.8-2.4 × ca. 0.3 mm, obscurely 4-or 5-ribbed, tuberculate, glandular. Corona absent.
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