Onopordum acaulon, L.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1976, Flora Europaea. Volume 4. Plantaginaceae to Compositae (and Rubiaceae), Cambridge University Press : 245

1. O. acaulon L. , Sp. Pl. ed. 2, 1159 (1763).

Stock sometimes divided and with several rosettes. Leaves up to 40 x 12 cm, oblong-oblanceolate to elliptic-lanceolate, shallowly lobed to pinnatisect, whitish- or grey-lanate with sparse unicellular hairs above, densely whitish-tomentose beneath; lobes with apical spine up to 10 mm; petiole flat. Capitula rounded at base, solitary or in clusters of 2-6; peduncles up to 30 mm, white-tomentose. Involucral bracts 3-4 mm wide at base, ovate-lanceolate, with an acuminate spiny apex 6-12 mm, glabrous, smooth dorsally. Corolla 22-25 mm, white. Achenes 4-5 mm; pappus 20-30 mm, whitish. Mountains of S. & E. Spain, Pyrenees, Corbières. Ga Hs.