A study of the mitotic behaviour of chromosomes of the different species and varieties ofAglaonemaandRichardiahas been presented in the paper. The Indian forms investigated areA. hospitum, A. costatum, A. costatum, var.‘foxi’andR. Elliottianashowing 38, 40, 48 and 32 respectively as the normal chromosome numbers. The high number of chromosomes ofAglaonemasuggests their polyploid constitution. Numerical differences maintained both at an intra- and interspecific levels clearly indicate their distinct relationship.