Representative most parsimonious, unrooted trees inferred from analysis of DNA sequence data. Base substitutions are reconstructed along interior branches, followed by bootstrap support values. Shaded regions around terminal branches circumscribe individuals of the same taxon, using colors for Navarretia vividior, N. modocensis, N. aeroides, and N. torreyella that correspond with the colors of symbols used in Fig. 4. Branches not found in all most parsimonious topologies for each region are represented by dashed lines. A Single topology inferred from concatenated cpDNA sequences B One of eight topologies inferred from nrDNA ITS sequences C Single topology inferred from nuclear idh-B sequences D One of 13 topologies inferred from nuclear idh-A sequences E One of nine topologies inferred from nuclear PI sequences.