Abstract
SUMMARYIn the present paper, the morphology of the somatic chromosomes and meiotic behaviour of Russelia equisetiformis Schlecht et Cham, and R. coccinea (Linn.) Wettst. has been described in detail and discussed.The chromosome number is 2n = 20 and n = 10 in both species. The chromosomes in R. equisetiformis are larger in size and fall under nine types out of which two pairs (type A and type C) are satellifed. The somatic complement of the other species 'R. coccinea) however, has only one pair of satellited chromosomes (type A). The chromosomes, in this species can be classified in eight types only.The meiotic division is fairly normal in both species. A high degree of secondary association of bivalents has been observed and the maximum association was found to be 2(3) + 2(2) indicating the basic number as four only.Lack of synchronisation in the meiotic division in the anthers of a flower was found to be characteristic in the two species studied. The presence of non-chromatic extranuclear bodies, specia...
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