Atractylis cancellata subsp. cancellata

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 : 211

(a) Subsp. cancellata :

Involucre 5-15 x 5-12mm, slightly exceeded by upper leaves. Usually on calcareous or gypsaceous soils. Throughout the range of the species.