Ginkgo biloba L. is the only extant representative of Ginkgoales, and has high economic and scientific values.11 seed traits of 44 Ginkgo cultivar were studied. The results showed that the variances of weight traits were great while the variances of shape traits were low. The lowest value of weight variance (weight per seed, 12.95%) was still significantly higher than that of shape traits (nut width, 12.95%). The results of classification by principle analysis method differed greatly from those by tradition...