jack pine Pinaceae Pinus banksiana
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.