Fig. 3

Phylogenomic and biogeographic analysis of Hydrocharis. A the phylogenetic tree of Hydrocharitaceae was reconstructed from 78 PCGs sequences. B the dated phylogenetic tree of Hydrocharitaceae. Caret indicates the data downloaded from Ross et al. (2016). Asterisks represent bootstrap support = 100/posterior probability = 1.00; the first two values represent unpartitioned data, and the last two values represent partitioned data. Triangles indicate the fossil calibration nodes and numbers below branches refer to the mean divergent time estimates. Error bars indicate 95% highest posterior distributions. C the biogeographic analysis of the genus Hydrocharis. The black points indicates the location of Hydrocharis fossils [3]. D Plant photos of Hydrocharis and Limnobium were taken by Zhi-Zhong Li. a-b, H. chevalieri; c, L. laevigatum; and d, H. dubia