Cirsium tenoreanum, Petrak

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 : 235

9. C. tenoreanum Petrak , Cirsiotheca Universa 17: n. 168 (1921).

Biennial 15-60(-100) cm. Leaves arachnoid-lanate to -tomentose beneath; lobes linear-triangular to linear-lanceolate, with rigid apical spine 3—10(— 15) mm. Capitula usually numerous, in a dense corymb, with 2-8 subtending leaves equalling or somewhat exceeding capitulum. Involucre (17-)20-25(-30) x 12-30 mm, densely, rarely sparsely, arachnoid-lanate; bracts patent; middle with a rhombic, purple, fimbriate-ciliate appendage and weak apical spine 1 *5-3*5 mm. Corolla 17-28 mm, purple; tube as long as limb. Achenes 5-6 mm; pappus 16-22 mm. • C. & S. Italy. It.