, a new genus segregated from (Costaceae) based on phylogenetic and morphological evidence.

Previous studies recognized three major lineages of the family Costaceae: a South American clade, an Asian clade and a clade. However, the genus within the Asian clade has been shown to be non-monophyletic and its morphology has not been studied carefully. Therefore, the complete plastid genomes of species were obtained and the monophyly of was tested through four different datasets in this study. Plastid phylogenomic analyses of Costaceae revealed that is strongly supported as paraphyletic. Two major clades are recovered, namely the subclade and the subclade. Phylogenetic analyses based on an enlarged taxon sampling of the Asian clade using a two chloroplast markers dataset (K intron and L-F spacer) confirmed the paraphyly of . Meanwhile, morphological analyses suggested that members of the subclade differ from the remaining species in many characters including inflorescences, bracts, stigma, axillary buds, floral tubes and labellum. According to the present molecular and morphological evidence, the latter subclade is recognized as a new genus, . Two new species are described, four new combinations are made, and identification keys are also provided.