LP what did you google? depending on what words you used you might find non native species coming up which will make it more confusing. It's been a looong time since the forestry classes I had back in college, but I seem to recall that the species native to Canada are Trembling Aspen, Largetooth Aspen and Poplar. That doesn't look like a Trembling Aspen leaf, try looking up the other two and see if you get some pics that match up with your tree. If it doesn't look like either of them and you suspect it's a native tree (growing in the bush I'd assume so) as opposed to an ornamental, just google native poplars of Canada, or native aspen etc.
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