Abstract: An analysis has been made of the intraspecific variation in characters of 116 herbarium specimens and 620 seedlings from 14 populations which represented the natural range of E.tereticornis from Papua New Guinea to the South of the Australian continent,using the method of multivariate analysis.(A population of"Mysore hybrid" from India was also included). It was found that there were some correlations between the patterns of geographical variation in characters of the species and latitude.The variations represent responses to changes of environmental factors,especially annual temperature and rainfall. There were significant differences in morphological characters and growth rate of seedlings raised under uniform growing conditions.The degree of variation in seedling characters between populations was much larger than that of characters in adult trees.The patterns of variation in seedlings may be genotypic variation in the different geographical localities.It seemed probable from the patterns that there is both ecological divergence and hybridism also interspecific with the related species among the populations of E.tereticornis.