Trees of Canada - Jack pine
The jack pine is one of Canada's most versatile trees.
This tree grows from coast to coast, and prefers harsh rocky or sandy soils.
As a cold-tolerant pine, it's found throughout Canada. From the Yukon territory down to northern Ontario through to the maritimes, there is no province or territory where this tree doesn't grow. Of the pines, jack pine (pinus banksiana) is the most cold hardy in the country. It's unique in several ways that can be noticed immediately upon seeing it.
The first thing you will realize is that the cones are different. Unlike most pine trees which drop their cones on a regular basis, jack pine cones can stay on the tree for up to 10 years! Often the branch itself falls off before the cone does, and even then the cone can remain tightly closed. So how do the seeds propagate?
Often the curved cone remains on the branch. The reason for the cones being so tightly closed is their trigger for reproduction: forest fires. Only when substantially heated will the cone of the jack pine open, softening the sticky resin and releasing its seeds. The idea being that after a fire, the forest floor is rich in nutrients and will provide the ideal conditions for a small pine seedling.
Jack pine has short, twisted needles that make it easy to tell apart from the other pines native to Canada. The bark is grey and scaly when older, and trees are often crooked and stunted on poor sites. A true rugged tree, it often colonizes rocky or sandy sites in pure stands.
What can be said about this tree? It's a survivor of adverse conditions, pioneer of inhospitable sites and forest fire opportunist. It provides timber and firewood in many communities where it grows. If you live in Canada, especially in the north, the jack pine is a tree certainly worth knowing about.
All photos were taken by myself and are free to re-use for educational purposes.
The Jack Pine is such a quintessential tree of Canada! They were in so many paintings by the Group of Seven. With "The Jack Pine" by Tom Thomson being the iconic painting. Your photos do a nice job of showing those odd little cones that stay there a long time! : )
Thanks for your comment! The Jack pine may not be a very beautiful tree, but it's unique and definitely one of Canada's most widespread trees. Where I live though, it's quite rare. Did you know the sugar maple on which our red and white flag is based only grows in the eastern half of the country? Maybe we should have a pine or spruce cone on our flag instead :)
I've never given it much thought, but you're clearly right about your flag and the range of the Sugar Maple. The Bigleaf Maple out here in the west is so closely related, but isn't the same -- at least not enough for the flag. Maybe there should be a loon on your flag! : )