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 coronaria fruit clings to the branches on clustered stems long after the leaves have fallen. "Malus coronaria" var. "coronaria"<br> "Malus coronaria" var. "dasycalyx" Pehr Kalm, who was one of the twelve men whom Linnaeus called his apostles and sent forth to explore the vegetable world, wrote from America: Malus coronaria Malus coronaria, also known by the names sweet crabapple or garland crab, is a North American species of "Malus" (crabapple). It grows primarily in the Great Lakes Region and in the Ohio Valley, with outlying populations as far away as Alabama, eastern Kansas, Long Island, and Ontario. "Malus coronaria" often is