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 'Evereste' Malus 'Evereste' "Malus" PERPETU 'Evereste' is an ornamental cultivar of crabapple that has been developed by INRA in 1974 and is registered under their trademark with the name "Malus" perpetu. 'Evereste' is a small deciduous tree to a height of 7 m (22 ft), and spread of 6 m (20 ft), broadly conical in outline, with more or less lobed leaves. The 'Evereste' crabapple is an excellent tree for spring blossom, with so many flower that you can hardly see any bark beneath. Flowers are 5 cm in width, 5 cm (2 in) across, Freely born red in bud but