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USA (national)

Washington State Tree:

Western hemlock trees in Washington - click to see all state trees
Western hemlock trees in Olympic National Park, Washington -
photo by Tom Green on Flickr - noncommercial use permitted
with attribution / share alike. See All State Trees.

Western Hemlock

Washington designated the western hemlock (Tsuga heterophylla) as the official state tree in 1947. A large evergreen coniferous tree native to the west coast of North America, the western hemlock tree is the largest species of hemlock (growing an average of 50 - 70 meters tall, and sometimes to 78 meters) with a trunk diameter of up to 2.7 meters. The western hemlock lives a long life (trees over 1200 years old are known). Washington's abundant evergreen forests are the basis for its unofficial nickname: The Evergreen State.

Western hemlock tree in spring - click to see all state trees
Western hemlock tree in spring - photo by Dan Nevill on Flickr -
use permitted with attribution / no derivative works.
See All State Trees.

Closely associated with temperate rain forests, most western hemlock trees live less than 100 km from the Pacific Ocean (with the exception of an inland population in the Rocky Mountains of southeast British Columbia, northern Idaho and western Montana).

Western hemlock pine cones - click to see all state trees
Photo of western hemlock foliage and cones by Menchi / Wikipedia
published under terms of GNU Free Documentation License
Version 1.2
or later. See All State Trees.

A very shade-tolerant tree, young trees usually start growing under the canopy of other conifers such as Sitka Spruce and Douglas-fir, eventually replacing them in climax forest as those species cannot grow in the dense shade cast by Western Hemlocks.

Source:
State Symbols: Washington State Legislature
Tsuga heterophylla: Wikipedia.org
Links:
All State Trees

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