Chromosomenzahlen einiger Arten der GattungBiscutella L.

Summary The chromosome numbers of 11 species ofBiscutella were counted, in 5 species they were found out for the first time.Biscutella laevigata proved to be diploid in some places of Baveria, which are accordingly Submediterranean not Dealpin relicts. Chromosome numbers of n=8, 9 and 18 were counted in Spanish species of the Ser. Laevigatae. By these investigations it was shown that The problem ofBiscutella laevigata (Manton, 1934, 1937) and its allied species is not yet solved, but further cytotaxonomical research may bring forth fundamental results.