Perennial herb, rootstock woody, creeping. Stems solitary, unbranched, up to 1 m high, densely leafy above, glandular-hairy to ± glabrous. Leaves lyrate-pinnatifid, up to 120 x 25 mm, sessile; apical lobe very large, ± falcate, lanceolate to narrowly elliptic, acute; lower lobes 2-4 each side of petiole-like base, lanceolate, up to 15 mm long, margins ± doubly serrate, apex of main teeth ± incurved, upper surface ± glabrous, lower surface ± thinly cobwebby. Inflorescence a dense corymbose panicle. Capitula many, radiate, disc and rays yellow, rays 8-13, short, soon recurved; involucre campanulate; bracts 12, 3.0-3.5 mm long, resinous, glabrous. Flowering time Mar.-May. Cypselae cylindrical, 1.75 mm long, ribbed, glabrous.
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Perennial herb, up to 1 m high. Leaves lyrate-pinnatifid, lower surface thinly cobwebby with few long gland-tipped hairs on veins. Heads radiate, rays 8-13; involucral bracts 12, 3.0-3.5 mm long. Achenes and ovaries glabrous. Flowers yellow.
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