The genus Leucanthemum (Compositae, Anthemideae) is a species-rich polyploid complex from southern and central Europe, comprising 41 species with ploidy ranging from 2x to 22x. Greiner et al. use a combination of molecular and systematic techniques to infer the evolutionary history of the L. pluriflorum clan in the north-west of the Iberian Peninsula, an important Pleistocene glacial refugia. They find that while chloroplast sequence data demonstrate the distinctness of the species group around the diploid L. pluriflorum, AFLP fingerprinting provides evidence for auto- and allopolyploid formation of the tetraploids and hexaploids of the group. Three of the four species studied can easily be characterized by their eco-climatologically and/or phytosociologically defined habitats.