Luotian county is one of the major distribution areas of Ginkgo biloba in Dabie Mountain area of Hubei Province. This paper made a preliminary study of the variations of the seed nucleus characteristics in this area. The results showed that great variation existed: (1) There were great differences in seeds’ surface characteristics. (2) There are four seed types, i.e. Fozhi (29.17%), Maling (52.08%), Meihe (16.67%), Yuanzi (2.08%), no Changzi. (3) Differences of seed's length, width and thickness among indiv...