Western Red Cedar (Thuja plicata).
From: http://www.for.gov.bc.ca/hfd/library/documents/treebook/westernredcedar.htm
“The western redcedar has been called “the cornerstone of Northwest Coast aboriginal culture,” and has great spiritual significance. Coastal people used all parts of the tree. They used the wood for dugout canoes, house planks, bentwood boxes, clothing, and many tools such as arrow shafts, masks, and paddles. The inner bark made rope, clothing, and baskets. The long arching branches were twisted into rope and baskets. It was also used for many medicines.”
Westmount Overlooked 