Ptilostemon gnaphaloides subsp. gnaphaloides

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 : 243

(a) Subsp. gnaphaloides ( Cirsium gnaphalodes Sprengel ): Leafbase with laciniae 0-3-2(-4) mm. Involucre 16-22 x 15-18(-25) mm; inner and middle bracts appressed, unarmed, the outer with patent to deflexed apex having a soft spinule up to 1 mm. 5. Italy, N. W. Greece (Kerkirä); locally naturalized in S.E. France.