XVI International Botanical Congess

Two phylogenetic analyses were performed based on ITS1+5.8S+ITS2 sequence data, each one with a different sampling approach. The first analysis included only one terminal per taxon and covered the whole genus. The second analysis focused on a group of Iberian species among which the occurrence of gene flow was suspected. In this approach the sampling included several sequences per taxon. The results revealed the existence of several ribotypes within the same species and that the same ribotype was shared by sympatric and parapatric species. We conclude that restriction of intraspecific sampling to one terminal can obscure critical evolutionary mechanisms like occurrence of reticulate evolution or phenomena like rDNA concerted evolution.