Different samples of two species of annual chrysanthemum-C. carinatum and C. coronarium were analysed cytologically. These two species were found to maintain a significant amount of interchange heterozygosity. Presence of heterozygosity in C. coronarium has been observed for the first time and the variation in the size of multiples from the earlier studies on C. carinatum was also observed. This difference is concluded to be due to the difference in climatic factor.