﻿AbstractThe results of phylogenetic analysis, based on the whole chloroplast genome and morphological study support the transfer of a long ignored bamboo species,Sasagracilis, to the recently established genus,Sinosasa, in this study. Morphologically, this species differs from all the other knownSinosasaspecies by having very short (2–3 mm) foliage leaf inner ligules, which is unusual in this genus. A revised description of its morphology and colour photos are also provided.