Morphological and molecular evidence suggests that and (Poaceae, Bambusoideae, Arundinarieae) are conspecific.

is a bamboo with great economical value, but its generic designation has been controversial for a long time. This study aims to ascertain whether belongs to or , based on morphological and molecular evidence from both plastome and single-copy nuclear orthologous genes. The results of phylogenetic analyses, based on plastid genomes and nuclear gene sequences, both strongly supported that is distantly related to other members of , but clustered with , the type species of . Further morphological studies demonstrated that is conspecific with . Thus, was proposed as a synonym of . Colour plates as well as a detailed description of this species are also provided.