Cytotaxonomic studies in the genusJasione L. I.Jasione montana L.

Chromosome numbers of 46 samples referable to the speciesJasione montana L. were examined. The material originated from different localities in Portugal, France, the Netherlands, Germany, Switzerland, Austria, Czechoslovakia, Poland, and the Soviet Union. All the samples were found to be diploid, having 2n=12 chromosomes. The aneuploid number, 2n=14, is shown to be limited to the var.litoralis Fries. Polyploidy has not been observed.