MaturaseK ( K) gene of chloroplast DNA has served as an appropriate candidate to be aDNA marker in angiosperms. Using this marker, 19 species of genus , one of theecologically important crop, collected from Indonesia and Thailand were analyzed.Phylogenetic analysis using parsimony method revealed that the gene could clasifyinto three major groups, namely group I, II, and III. Moreover, the K gene can identifyspecies originated from Thailand. Although this classification system is differentwith the previous classification system, it can provide a new information on the current status oftaxonomy. Further result exhibited that DNA sequences of the K of twospecies ( dan ) are different between Indonesia and Thailand specimens.