ISSR-PCR was used to detect the genetic diversity and relationship of 41 varieties of Loropetalum chinense var. rubrum. ISSR fingerprinting amplified by 14 ISSR primers revealed a total number of 203 unambiguous bands,of which 148 ones were polymorphic and the polymorphism frequency was 72.9%. As analyzed by NTSYS-pc(version 2.10e),the similarity coefficient between varieties ranged from 0.626 to 0.926. These 41 varieties of L. chinense var. rubrum were divided into five groups by UPGMA based on Jaccard coe...