Native Trees of Canada

I found this little book from the sixties in a thrift store in Gravenhurst, ON. The cover is fantastic with the wonderfully simplistic arrow-shaped tree and the use of script, serif, and san serif typefaces. The contrast between the simple shapes and the bold colours gives an overall modern feel to the book. Using the "Department of Forestry" as the roots of the tree preventing the tree from being cut down is excellent.
As you flick through the book the pages display informal illustrations of all the various Native Canadian trees and their specific leaves, buds, branches etc. I would love to know who designed it if anyone knows out there!