Bayesian 50% majority-rule consensus tree of the combined dataset of the Caucasian Campanula species based on three plastid markers (trnK/matK, petD and rpl16). Values above nodes indicate posterior probabilities (bold) and maximum likelihood bootstrap support (italic), values below nodes indicate maximum parsimony jackknife support, values in square brackets indicate conflicting topologies. Sample designations include the taxon name, DNA lab code, and ISO (international organization for standardization) country code, in case of the Russian part of the Caucasus also the TDWG (Biodiversity Information Standards) code of the territory (n.d. – sample not documented); for DNA lab codes and ISO codes of collapsed terminals with multiple accessions, see Suppl. materials 1, 2. Abbreviations in species names: A. – Adenophora, As. – Asyneuma, Az. – Azorina, C. – Campanula, G. – Githopsis, M. – Michauxia, Mu. – Musschia, P. – Petromarula, Ph. – Phyteuma. Sample designations in bold (in black) indicate species from the core Scapiflorae clade, sample designations in blue indicate Scapiflorae group members phylogenetically distant from the core clade. Subdivision of the Scapiflorae clade by numbered terminal clades (1-17) and geographical distribution of the lineages.