Abstract
Taxonomic revision of the Centaurea alba L. complex (Asteraceae) in the Iberian Peninsula.- A taxonomic revision of the Centaurea alba L. complex (Centaurea L. sect. Centaurea) in the Iberian Peninsula is presented, which is represented by two species, C. alba and C. costae Willk. Three subspecies of C. alba with reasonably well-defined areas are recognized: C. alba subsp. alba, with three varieties –alba, macrocephala Pau and latronum (Pau) E. Lopez & Devesa-, C. alba subsp. aristifera (Pau) E. Lopez & Devesa and C. alba subsp. tartesiana Talavera, two of them are proposed as new nomenclatural combinations. Centaurea costae is segregated from C. alba and three varieties are recognized: costae, montsicciana Pau & Font Quer and maluqueri Font Quer. In the case of C. alba var. latronum, C. alba var. macrocephala and C. alba subsp. aristifera, the chromosome number was also studied (2n = 18).
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