Abstract:This paper expounds the karotypic differdntiation of Fokienia hodginsii collected from the central part of Fujian Province, China. All the four populations studied were found to have the same somatic chromosome numbers of 2n =22, but there were more or less differences in karotypeic constitution among the four populations. The two populations with columner tree crown have four sat-chromosomes, while the remainder two with wide tower-shaped tree crown have only two:sat-chromosomes. The authors consider that the karyotypic variation might be related to the variations of crown shape and fertility of these populations, and suggest that the populations with columnar tree crown, which might be represent a new variant type, and have impirtant value, and should be protected and further studied.