Polyploid Campanula patula in the Czech Republic

Tetraploid Campanula patula L. (2n=40) is reported from the Šumava Mts. (the first record from the Czech Republic). A hexaploid (2n=60) was found in the Krušné hory Mts. (the first record of hexaploidy in this taxonomic group). Polyploids differ from the diploids by quantitative morphological characters . A number of localities of presumed polyploids (according to their morphology) are given from both mountains. Polyploids prefer slightly disturbed habitats, mostly along forest tracks. The relation of the tetraploid cytotype to C. patula L. subsp. jahorinae (K. Maly) Greuter et Burdet and the possible hybrid origin of hexaploids are discussed.