ARBORETUM - JACK PINE

Taken 1969-12-31 16:00:00-08

There is only one jack pine in the arboretum. Pinus banksiana ranges from 922 m (3072 ft) in height. Some jack pines are shrub-sized, due to poor growing conditions. They do not usually grow perfectly straight, resulting in an irregular shape similar to pitch pine (Pinus rigida). 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 forest fire kills the mature trees and opens the cones, reseeding the burnt ground.


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