Ptilostemon stellatus, (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

9. P. stellatus (L.) W. Greuter , loc. cit. (1967)

( Cirsium stella­ timi (L.) All.).

Annual (6-)15-30(-70) cm. Leaves linear to linearlanceolate, entire, sparsely arachnoid-hairy to glabrescent and scabrid above, with 1-3 stout basal spines (5-)10-20(-35) mm on each side, and an apical spine 1-1-5 mm. Capitula few, in racemes or corymbs, rarely solitary. Involucre 15-25 x 10-15 mm; outer and middle bracts with conspicuous white ventral swelling, the apex patent, subulate-spinose. Corolla 12-18 mm. Achenes 4-5 mm; pappus 11-15 mm. 2« = 24. Waste places and stony ground. • E. Mediterranean region, extending westwards to Sicilia. Al Cr Gr It Ju Si.