Ptilostemon casabonae, (L.) W. Greuter

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 : 244

8. P. casabonae (L.) W. Greuter , loc. cit. (1967)

( Chamaepeuce casabonae (L.) DC. ).

Monocarpic perennial 40-100(-150) cm. Stemsparsely arachnoid-hairy toglabrescent. Leaves lanceolate to linear-lanceolate, entire or very slightly sinuate, the marginal spines (2—)5—15 mm, slender, in clusters of 2-4(-7) which arise froma common insertion. Capitula subsessile, in a terminal spike. Involucre 15-25 x 14-20 mm; bracts with a slender apical spine. Corolla 18-22 mm. Achenes 3-4 mm; pappus 13-18 mm. In — 32. Dry, open habitats. • W. Mediterranean region. Co Ga It Sa [Lu].