Carduus defloratus subsp. defloratus

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 : 227

(a) Subsp. defloratus ( C. crassifolius Willd. , C. summanus Pollini ): Leaves entire and spinulose-ciliate or dentate with 12-25 pairs of spinose teeth up to 5 mm. Outer and middle involucral bracts 0-5-0-75 mm wide at the middle, linear-subulate, subacute, mucronate; inner 1| times as long as the inner middle. Achenes with a 5-lobed apical prominence. 2л= 18. N. Appennini, S. & E. Alps.