Carduus collinus subsp. glabrescens

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 : 228

(c) Subsp. glabrescens (Sagorski) Kazmi , Mitt. Bot. Staatssamm. (München) 5: 412 (1964):

Lower leaves up to 30x 9 cm, with petiole c. f as long as lamina; cauline leaves lobed for up to i way to midrib, with 2-5 pairs of ovate, lobulate lobes each with an apical spine up to 2 mm, glaucescent and with a sparse indumentum beneath. Inner bracts tapering at apex. Carpathians.