Onopordum illyricum subsp. horridum, (Viv.) Franco

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 : 247

(c) Subsp. horridum (Viv.) Franco , loc. cit. (1975)

( O. horridum Viv. ):

Stem glabrescent; wings up to 15 mm wide, with a spine up to 8 mm. Leaves green, very sparsely arachnoid-hairy and with prominent veins beneath. Involucral bracts narrowing into a spine up to 3 mm, usually appressed, though recurved in apical Corolla 25-30 mm. • C. Mediterranean region.