Malus sylvestris to most European countries. It occurs in a scattered distribution pattern as single individuals or in small groups. In the past "M. sylvestris" was thought to be the most important ancestor of the cultivated apple ("M. pumila"), which has since been shown to have been originally derived from the central Asian species "M. sieversii". However another recent DNA analysis confirms that "M. sylvestris" has contributed significantly to the genome. The study found that secondary introgression from other species of the genus "Malus" has greatly shaped the genome of "M. pumila", with "M. sylvestris" being the largest secondary contributor. It also
Malus transitoria Society's Award of Garden Merit. It is also used as rootstock for other apples. Malus transitoria Malus transitoria, the cut-leaf crabapple, is a species of flowering plant in the crabapple genus "Malus" of the family Rosaceae. It is native to China. The Latin "transitoria" means "short-lived". The name "cut-leaf" refers to the shape of the leaves. "Malus transitoria" is a deciduous tree growing to tall by wide. The deeply divided leaves turn yellow in autumn. It produces abundant white flowers, and small yellow fruits 8 mm in diameter. Varieties include: "Malus transitoria" is cultivated as an ornamental tree, for its