Host plant use in Anthocharis cardamines. The columns show for each species in each region: the number of populations sampled, the number of A. cardamines eggs found, the number of eggs per sampled plant (total number of eggs on a species in a region/total number of host plant individuals of this species within the region), the proportion of the total number of eggs laid on each host species, the number of plant individuals surveyed for eggs and, within brackets, the number in which phenotypic traits were measured. Missing data entries denote plant species not found in the respective regions