jack pine

a scrubby pine, Pinus banksiana, growing on tracts of poor, rocky land in Canada and the northern U.S., bearing short needles and curved cones.
Also called gray pine.


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World English Dictionary
jack pine
a coniferous tree, Pinus banksiana, of North America, having paired needle-like leaves and small cones that remain on the branches for many years: family Pinaceae

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Example sentences
Wooded parts of the natural area include alder forest and jack pine, oak and
  red maple barrens.
The jack pine is unique because its resinous cones open and release seeds
  during a fire or from an intense, hot sun.
The driest jack pine-northern pin oak barrens did not change significantly
  after logging.
Fire opens the cones of the jack pine, spreading new seeds.
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