Study on the Phenotype Diversity of Woody EnergyPlantXanthoceras sorbifolia

15 phenotypic tra its w ere investigated fo r 14 popu lations ofXanthoceras sorbifolia Bunge. Phenotypic variat ion, wh ich w ere among populat ions and w ith in popu lations, w ere studied by using nested variance ana lysis and variation coeff icien.t The corre lation ana lysis and c luster ana lysis show ed the relat ion among tra its and geograph ica l facto rs. The variation w ithin populations w as much g reater than that among populat ions. The seed number in fruitw asdecreased w ith the long itude increase. The fru it w idth w as improved w ith lat itude increasing and the annual meantemperature decreasing. Therew as no sign if icant re lationsh ip betw een geog raphic d istances and euclidean d istance.