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A karyotype analysis of five accessions of Lens ervoides Brign. was done to assist in determining phylogenetic relationships within the genus Lens. There were no differences in gross chromosomal morphology of the different lines. The diploid chromosome number was 14 and the total chromosome length was 42.9 μ. The karyotype was characterized by four submetacentric and three acrocentrlc chromosome pairs. The fifth longest chromosome pair carried a conspicuous secondary constriction. The karyotype formula was: K(n = 7) = 3 Sm + 1 Sm Sc + 3 Acro. A karyogram and idiogram were prepared to assist in further phylogenetic studies. The karyotype of L. ervoides is similar to that of the cuhlgen L. culinaris Medik., suggesting that speciation involved chromosomal rearrangements that left minimal evidence in the karyotype.

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