Aneuploid chromosome numbers have been found in Indian material of Chara zeylanica var. zeylanica f. elegans (A.Br. & T.F.A.) Gr. & J.Gr. (n = 48) and Nitella acuminata var. acuminata f. belangari (A. Br.) R.D.W. (n = 29). The cytotaxonomy of the C. zeylanica complex has been discussed with reference to the antheridial scutae number. On karyotypic grounds N. acuminata f. belangari has been given the status of‘variety’.