New Combination and Two Synonyms of Indocalamus Nakai (Poaceae: Bambusoideae) from China Based on Morphological Characters and Phylogenetic Evidence

Based on several sources of evidence from morphology, the micromorphology of the abaxial leaf epidermis, and a phylogenetic analysis using complete chloroplast genome data, a new combination and two new synonyms are reported in the genus Indocalamus Nakai. Indocalamus cordatus T. H. Wen et Y. Zou is synonymized with I. tessellatus (Munro) P. C. Keng, and I. chebalingensis W. T. Lin is synonymized with I. multinerus (W. T. Lin et Z. M. Wu) W. T. Lin. As a new combination, I. mollis (H. R. Zhao et Y. L. Yang) L. Q. Gao, W. G. Zhang et G. Y. Yang was created and is supplementally described. In addition, the lectotype of I. multinerus is designated herein.