Table 1. Comparison of chloroplast genome feature of five Viola species.

Feature	V. mirabilis	V. phalacrocarpa	V. raddeana	V. seoulensis	V. websteri
Genome size	158,162	157,842	157,597	156,507	158,111
LSC	86,565	86,367	86,460	85,691	86,588
SSC	17,351	17,305	17,289	18,008	17,191
IR	27,123	27,085	26,924	26,404	27,166
GC content	36.2	36.3	36.2	36.3	36.2
LSC	33.8	33.9	33.8	33.8	33.7
SSC	29.9	29.8	29.9	29.6	29.9
IR	42.2	42.2	42.3	42.6	42.1
Number of genes	111	111	111	111	111
Protein coding genes	77	77	77	77	77
tRNA genes	30	30	30	30	30
rRNA genes	4	4	4	4	4