Three typical habitats of Liangshui, Xiaobeihu and Changbai Mountain were selected according to the difference of altitude and latitude in natural distributive of Pinus koraiensis area of China. The needles length of the first class branches, the length and width of cones, the seed number of per cone, the weight per 1000 grains of seeds and the morphology of bark were measured. The results indicate that the average length of needles of Korean pine distributing in the middle part is longer than that ...