Phylogeny and divergence time estimates of Hydrocharitaceae based on combined 18S + rbcL+ matK+ trnK 5' intron + rpoB+ rpoC1 + cob + atp1 data set. Numbers above branches refer to the maximum likelihood bootstrap values (BS, left) and the posterior probabilities (PP, right). Numbers in blue refer to the branches with BS> 95 and PP = 1.0. Gray bars indicate 95% highest posterior distributions, and nodes labelled with stars refer to the positions of fossil calibration points.
Chen et al. BMC Evolutionary Biology 2012 12:30 doi:10.1186/1471-2148-12-30