The present paper deals with the cytology including karyotype analysis of eight species and varieties ofBegonia, viz.B. pauperculaKing, (2n= 22);B. rexPutz., (var. I), (2n= 22);B. rexPutz. (var. II), (2n= 32);B. rexPutz. (var. III), (2n= 34);B. malabaricaLam., 2n= 28);B. laciniataRoxb. (var. I), (2n= 20);B. laciniataRoxb. (var. II), (2n= 22);B. sp.(unidentified), (2n= 28). In addition to these two varietiesB. giganteaWall., and two varieties ofB. semperflorens, were observed. One of the former two varieties showed 2n= 28, 32 and 34 chromosomes and in another 2n= 40 and 42 chromosomes were counted in the somatic tissue and the latter in meiosis showed 40 to 46 chromosomes. The implications of such aneuploid numbers have been pointed out.