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Tufted perennial, up to 2 m tall, stems glandular-haired, glabrescent, often flushed purple. Leaves alternate, narrowly oblong, 4-8-pinnatifid, basal ones 80-150 mm long, upper smaller and semi-amplexicaul, both surfaces glabrescent, lobes toothed and spine-tipped, with pale spines 3-6 mm long. Flowerheads in paniculate cymes, discoid, yellow, 30-50 mm diam.; outer and median involucral bracts lanceolate with spiny margins, median longest, 12-20 mm long. Pappus scales 10 + 10, oblong, denticulate, ± 1 mm long.
Perennial shrub or herb, 0.5-1.5 m high; erect; stems glandular, ± glabrous. Leaves alternate, sessile, narrowly oblong, pinnately lobed, margins spinose-denticulate. Capitula terminal, discoid; involucral bracts patent, narrowly triangular or lanceolate if apex is acuminate, spine tipped, margins spiny. Pappus of subbiseriate scales. Cypselae2-3 mm long, subglabrous.
Glabrescent or glandular-hairy perennial to 1.5 m. Leaves oblong, pinnatisect, lobes cuneate, toothed, spiny, upper surface sometimes bristly, upper leaves auriculate. Flower heads discoid, yellowish, several in terminal corymbs.
