关键词: 竹亚科, 复合体, 表型, 井冈寒竹

Abstract:

Gelidocalamus stellatus Wen complex includes Gelidocalamus stellatus, Gauritus, Gmonophyllus, Gmultifolius and Gwugongshanensis, 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 276%, while the minimum is the ratio of length and width with 64%; 2) In the JingGang 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 Gstellatus 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 JiuYi Mountain population (JYM) and XiaoLongGui population (XLG) share the same or similar traits with that of JGM, there have many remarkable differences between other populations, such the leaf in LianPing Country population (LPC) and HuangHe Village population (HHV), the culm in WuGong Mountain population (WGM) and the numbers of each branch in GanZi Depression population (GZD) and RongJia Cavity population (RJC). With the observation of the culmsheath and the abaxial epidermis of leaves, the taxonomic position of some populations is discussed. Our results still indicate that Gmultifolius (HuangHe Village population) and Gauritus may be null and void. Furthermore, we proposal Gwugongshanensis (WuGong Mountain population) and Gmonophyllus (JiuYi Mountain population) should be as a taxon under Gstellatus.

Key words: Bambusoideae, Complex, Phenotypic, Gelidocalamus stellatus Wen