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Western hemlock (Tsuga heterophylla) belongs to Pinaceae (the Pine family). It is a tall evergreen tree that is native to the west coast of North America. This tree grows in coastal forests, and it can reach 50–70 m in height and about 1.2 m in diameter. The crown is a very neat broad conic shape in young trees with a strongly drooping branches, becoming cylindric in older trees. The bark is brown to black, thin and furrowed. The leaves are flattened, single needles, and spirally arranged. The fruits are small, woody, egg-shaped cones about 2.5 cm long. This tree is an important timber tree throughout the region, and it is also the state tree of Washington.
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