Centaurea boissieri, DC.

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 : 279

129. C. boissieri DC. , Prodr. 7: 303 (1838).

Perennial. Stems 10-30 cm. Leaves glabrous to lanate. Capitula usually solitary. Florets pink or purple. Pappus as long as achene. 5. & E. Spain. Hs.

1 Stems + erect 2 Leaves whitish-tomentose or -lanate above (k) subsp. spachii 2 Leaves green above (i) subsp. paui 1 Stems procumbent or ascending 3 Leaves green above 4 Leaves green beneath (g) subsp. mariolensis 4 Leaves grey-tomentose beneath (f) subsp. pomeliana 3 Leaves white- or grey-tomentose on both surfaces 5 Leaves white-tomentose 6 Involucre ovoid-cylindrical (a) subsp. dufourii 6 Involucre ovoid to ovoid-globose 7 Leaf-segments lanceolate; appendages triangular-lanceolate (e) subsp. willkommii 7 Leaf-segments linear; appendages ovate (j) subsp. jaennensis 5 Leaves grey-tomentose or -arachnoid 8 Involucre ovoid-cylindrical 9 Appendages long pectinate-fimbriate (b) subsp. resupinata 9 Appendages very shortly fimbriate-dentate

(c) subsp. prostrata 8 Involucre ovoid or ovoid-globose 10 Stems decumbent; involucre ovoid (h) subsp. pinae 10 Stems ascending; involucre ovoid-globose

(d) subsp. boissieri