jack pine Pinaceae Pinus
|Leaf: Evergreen needles, 3/4 to 1 1/2 inches long, two twisted, divergent needles per fascicle, fascicle sheath is present but short; yellow-green in color.
Flower: Species is monoecious; males cylindrical, yellow-green, in clusters at twig tips; females oval, reddish.
Fruit: Serotinous, persistenting on the tree for several years; 1 1/2 to 2 inches long, curved, light brown but graying with age; apophysis round and umbo armed with a small prickle.
Twig: Yellow to greenish brown when young, turning gray-brown with age, very resinous, narrowly ovoid buds.
Bark: At first dark and scaly, the bark later develops scaly ridges.
Form: A small to medium sized tree up to 80 feet tall, with a small, irregular crown. Dead branches self-prune poorly. Cones are retained for several years, resulting in a coarse appearance.
Looks like: lodgepole pine
- Scots pine
- Virginia pine
| Additional Range Information:
Pinus banksiana is native to North America.
Range may be expanded by planting.
See states reporting jack pine.
| External Links:
Silvics of North America
USDA Plants Database
|© Copyright 2016, Virginia Tech|
Dept. of Forest Resources
and Environmental Conservation,
all rights reserved.
Photos and text by: John Seiler,
Edward Jensen, Alex Niemiera,
and John Peterson