The complete chloroplast genomes and phylogenetic analysis of and (Hamamelidaceae).

and are two evergreen trees of the genus in the family Hamamelidaceae. In this study, the complete chloroplast genomes of and were sequenced, assembled, and annotated. The total lengths of the chloroplast genomes were 160,723 bp and 160,744 bp, respectively, and both had a GC content of 38.1%. The complete chloroplast genomes of these two species had typical quadripartite structures: LSC region (88,972 bp and 88,989 bp), SSC region (18,907 bp and 18,911 bp) and a pair of inverted repeats both of 26,422 bp. Both species contained 114 unique genes, including 80 protein-coding genes, 30 tRNA genes, and 4 rRNA genes. Phylogenetic analysis indicated that and are sister species to each other. Our results provide useful genetic resources for further studies on the origin and evolution of Hamamelidaceae.