Article

In parallel to the taxonomic treatment of Muscari and Bellevalia for the Flora of Armenia, the karyology of the Armenian representatives of these genera was studied. The obtained data confirm the cytological distinctness of Muscari (x = 9) and Bellevalia (x = 4). The karyotypes of all Bellevalia species investigated corresponds to the basic Bellevalia karyotype. Polymorphism was observed only with regard to satellites, which in B. glauca as a rule are found on one of the homologues of pairs 1 and 4 and vary in size, with a tandem satellite fixed on pair 1; in B. paradoxa a satellite is seen on the distai arm of pair 2. In octoploid B. longistyla a pericentric inversion and formation of a metacentric chromosome was found . Muscari caucasicum and M. tenuiflorum are characterised by the diploid chromosome number 2_n_ = 18, M. sosnowskyi has 2_n_ = 36, while in M. neglectum a hexaploid cytotype was found.