The Systematic Classification And Floristic Analysis Of Corydalis In Gansu Province

In this paper,corydalis plant samples collected from field investigation in Gannan,Longnan,Tianshui and other places of Gansu Province were classified and identified.Combined with more than 1000 Corydalis plant samples collected from 5 domestic Herbarium,the system and flora of Corydalis plant in Gansu Province were analyzed by using the method of systematic classification and flora analysis,and the following conclusions were obtained:1.There are 19 groups and 55 species(including 1 variety)of Corydalis in Gansu Province.Corydalis praecipitorum and C.tianzhuensis are endemic to Gansu Province.2.Corydalis plants in Gansu Province are mainly distributed in the middle and upper reaches of Bailong River and the middle part of Qinling Mountains,and more than 90% of the species are distributed at an altitude of 2000-3500 m.Five new recorded species are found,which are C.atuntsuensis,C.foetida,C.moupinensis,C.heracleifolia and C.lauchena.3.the similarity coefficient of Corydalis in Gansu province is larger than that in Shanxi province(45.45%)and Qinghai province(34.88%),but smaller than that in Sichuan,Ningxia,Xinjiang,Inner Mongolia,Yunnan and Tibet.4.55 species of Corydalis in Gansu Province belong to 19 groups,accounting for 50% of38 groups of Corydalis in China.Corydalis in Gansu Province is characterized by "polymorphism".This is of great significance to the compilation of the taxonomic key table reflecting the phylogenetic relationship of Corydalis in Gansu Province,the study of the flora of Corydalis in Gansu Province(including the laws of horizontal and vertical distribution,floristic components,endemic phenomena,floristic characteristics,and the relationship with neighboring flora),and the compilation of the part of Corydalis in flora of Gansu Province.