Centaurea alba subsp. latronum

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 : 288

(b) Subsp. latronum (Pau) Dostál, loc. cit. (1976)

( C. latronum Pau ):

Biennial. Stems up to 60 cm, paniculately branched, with virgate branches from the middle. Leaves green; lower pinnatisect with linear segments. Involucre (6-)7-8(-10) mm in diameter, ovoid-cylindrical; appendages broadly ovate, not covering bracts, with triangular-lanceolate, reddish-brown, obscurely striate central spot, the margin hyaline, lacerate, the apex emarginate, with rigid mucro. Florets pink. Achenes c. 3 mm; pappus c. 1 mm. • N.C. Spain.