Prunus domestica their sweetness and tartness may vary, their colors varying from bluish-purple to red, orange, yellow or light green. Prunus domestica Prunus domestica (sometimes referred to as "Prunus × domestica") is a species of flowering plant in the family Rosaceae. A deciduous tree, it includes many varieties of the fruit trees known as plums in English, though not all plums belong to this species. The greengages and damsons also belong to subspecies of "P. domestica". Its hybrid parentage was believed to be "Prunus spinosa" and "Prunus cerasifera".; however recent cytogenetic evidence seem to implicate 2x, 4x, 6x "P. cerasifera" as the
Prunus subg. Padus "Padus" is polyphyletic and is therefore invalid as a genus, subgenus or anything else. In Finland and Sweden, the blooming of bird cherry ("Prunus padus", Finnish "tuomi") signifies the start of the summer for many people. In southern Finland, this normally takes place during the two last weeks of May or very early June. North Dakota State University agriculture information page about "Prunus virginiana" Prunus subg. Padus Prunus" subg. "Padus (bird cherries) is a subgenus of "Prunus", characterised by having deciduous leaves, flowers 12-30 together on slender racemes produced in late spring well after leaf emergence, and small, sour fruit