Fig. 2

Maximum likelihood tree of Ludwigia sect. Isnardia inferred from the chloroplast atpB-rbcL region. The arrow indicates the crown node of Isnardia. Sample numbers (Additional file 1), ploidy levels (Table 1), and genome types (Table 1) are shown right after the taxa. Numbers at nodes show the bootstrapping values (bs) / posterior probabilities (pp) only when the bs at nodes are greater than 50 or pp at nodes are greater than 0.70. The scale bar denotes the branch length