Based on the survey of Chaenomeles cultivars resources, the numerical taxonomic method was used for the cluster analysis of 22 cultivars and 90 germplasm resources with 22 morphological characters related to fruit and seeds. The clustering result about cultivars revealed that Chaenomeles plant resources could be divided into 4 phenetic groups according to their botanical sources, namely C. japonica system (Ⅰ), C. speciosa system (Ⅱ), C. cathayensis system (Ⅲ) and C. thibetica (Ⅳ). The clustering result abou...