Jack Pine
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| Jack Pine Conservation status: Secure | ||||||||||||||||
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| Missing image JackPine23.jpg Image:JackPine23.jpg A young Jack Pine | ||||||||||||||||
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The Jack Pine (Pinus banksiana) is a North American pine with its native range in Canada east of the Rocky Mountains from Northwest Territories to Nova Scotia, and the northeast of the United States from Minnesota to Maine, with the southernmost part of the range just into northwest Indiana. In the far west of its range, it hybridises readily with the closely related Lodgepole Pine (P. contorta).
It is not a large tree, ranging from 9-22 m in height. Some Jack Pines are shrub-sized. This pine often forms pure stands on sandy or rocky soil. It is fire-adapted to stand-replacing fires, with the cones remaining closed for many years, until a natural forest fire kills the mature trees and open the cones. These then reseed the burnt ground.
The leaves are in fascicles of two, needle-like, twisted, slightly yellowish-green, and 2-4 cm long. The cones are 3-5 cm long, the scales with a small, fragile prickle that usually wears off before maturity, leaving the cones smooth. Unusually for a pine, the cones normally point forward along the branch.
Kirtland's Warbler (Dendroica kirtlandii), an endangered bird, depends on pure stands of young Jack Pine in a very limited area in the north of the Lower Peninsula of Michigan for breeding.
The Jack Pine has a long list of minor alternative names, including Eastern Jack Pine, Gray Pine, Black Pine and Scrub Pine; the last more commonly refers to Virginia Pine (P. virginiana), and Gray Pine to P. sabineana. The Canadian French name is Pin gris or (incorrectly) Cyprès.pl:Sosna Banksa