Abstract
Summary Cytotaxonomic study of Charophyte flora from lateritic belt of West Bengal, India, is being carried out. In the present communication, we present karyological observations of two ecorticated species of Chara, viz. C. wallichii A. Br. (dioecious) and C. braunii Gm. f. braunii R.D.W. (monoecious) collected from this region. Following refined pretreatment schedule, we have achieved marked improvement in chromosome preparation which helps to determine chromosome number accurately and reveal minute details of chromosome morphology. Chromosome numbers determined for both the taxa are n = 14, which confirms the earlier reports. Karyotypic details reveal distinct differences between these two species. This supports their distinct taxonomic position on the basis of differences in the disposition of sex organs, though there are some morphological similarities between these two species. Total form percent values (TF %) for C. wallichii and C. braunii f. braunii are 34.64 and 37.85 respectively, indicating sy...
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