Sour cherry commonly refers to cultivars of "Prunus cerasus". Edible cherries generally come from cultivars of the related species "Prunus avium" and "Prunus cerasus". He regards the shub as a variety of "Prunus cerasus", the sour cherry. Cultivars of the sour cherry "Prunus cerasus" that are grafted onto dwarfing rootstocks. Both species can interbreed with each other, as well as with "Prunus cerasus". Larvae gnaw the leaf margins of the host plants (especially "Prunus domestica" and "Prunus cerasus").