1.Meiotic chromosomes of seven species of the genusRubus(x=7), two species ofSpiraea(x=18) and one species ofPotentilla(x=28) have been studied (vide Table 1).2.SpiraeaandPotentillaspecies are tetraploid and octaploid respectivelly while all of the species ofRubusare diploid.3.Extranuclear bodies are seen in some species ofRubusand are non-chromatic.