Gelidocalamus stellatus Wen complex includes Gelidocalamus stellatus, Gauritus, Gmonophyllus, Gmultifolius and Gwugongshanensis, indicating the existence of some taxonomic disputes within this taxon. Based on 13 main phenotypic traits, in this paper, 13 populations of the complex are investigated and the results show that 1) All 13 characters have some changes between and within populations, of which the maximum is the height under branch with 276%, while the minimum is the ratio of length and width with 64%; 2) In the JingGang Mountain population (JGM), seven characters, such as the diameter at breast height, the node number, the height under branch, the leaf length, the leaf width, the ratio of leaf length and width, and numbers of each branch, are relatively stable among 4 different populations, and populations of Gstellatus Wen complex can be distinguished effectively by that seven characters, so it maybe have some worth for the clarification of the complex; 3) Besides that JiuYi Mountain population (JYM) and XiaoLongGui population (XLG) share the same or similar traits with that of JGM, there have many remarkable differences between other populations, such the leaf in LianPing Country population (LPC) and HuangHe Village population (HHV), the culm in WuGong Mountain population (WGM) and the numbers of each branch in GanZi Depression population (GZD) and RongJia Cavity population (RJC). With the observation of the culmsheath and the abaxial epidermis of leaves, the taxonomic position of some populations is discussed. Our results still indicate that Gmultifolius (HuangHe Village population) and Gauritus may be null and void. Furthermore, we proposal Gwugongshanensis (WuGong Mountain population) and Gmonophyllus (JiuYi Mountain population) should be as a taxon under Gstellatus.