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SUMMARYThis study is an attempt to analyse the variation in chromosome numbers of Leguminosae and its relation to evolution. Cytological observations were made on forty two species of Brazilian leguminous plants belonging to 25 genera. Chromosome numbers in 36 species are reported for the first time. Data from literature show marked chromosome variation among the 2,953 cytologically studied species of Leguminosae. The relation of polyploidy to geographic distribution is discussed. Tropical and woody Leguminosae are generally polyploid. The Leguminosae family unity in discussed on the basis of chromosome numbers among its species.
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Gerhard Bandel (1974) studied this question.
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