Abstract
Cytotaxonomical studies have been carried out on 30 species and varieties under 4 genera belonging to the tribe Scirpeae, as part of a programme of investigation of Indian representatives of the family Cyperaceae with the aid of suitable schedules. Detailed karyotype analysis shows a general resemblance of the chromosome morphology, testifying to the homogeneity of the group as a whole. The genus Fimbristylis has been found to represent a very primitive level of evolution as compared to the genus Eleocharis. On the basis of evidences, it has been pointed out that possibly the evolution from diffuse to localised centromere has been achieved in a short step, since both types of centromere have been recorded in the species of Scirpus and Eleocharis.
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