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WordNet
western white pine

n. tall pine of western North America with stout blue-green needles; bark is gray-brown with rectangular plates when mature [syn: silver pine, mountain pine, Pinus monticola]

Wikipedia
Western white pine

Western white pine (Pinus monticola) also called silver pine, and California mountain pine, in the family Pinaceae, is a species of pine that occurs in the mountains of the western United States and Canada, specifically the Sierra Nevada, the Cascade Range, the Coast Range, and the northern Rocky Mountains. The tree extends down to sea level in many areas, particularly in Oregon and Washington. It is the state tree of Idaho, and is sometimes known as the Idaho pine.