Malus sieversii in harsh climates unsuitable for "M. pumila", mainly for increased cold tolerance. "Malus sieversii" has recently been cultivated by the United States Agricultural Research Service, in hopes of finding genetic information of value in the breeding of the modern apple plant. Some, but not all, of the resulting trees show unusual disease resistance. The variation in their response to disease on an individual basis is, itself, a sign of how much more genetically diverse they are than their domesticated descendants. Malus sieversii Malus sieversii is a wild apple native to the mountains of Central Asia in southern Kazakhstan. It has
Malus transitoria 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 elegant shape, abundant white blossoms, and yellow fruits. It has gained the Royal Horticultural