Conifers
Others
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Hemlocks – Tsuga
The Northwest has two species of hemlock. It is easy to
distinguish them from other native conifers by their short, flat
needles and by the drooping leaders at the top of
each tree. The cones have rounded scales like Douglas fir, but
don't
have bracts protruding from them. You can usually distinguish one
hemlock from the other by elevation, although their ranges overlap.
Where they do grow together, the needle arrangement and cone size will
show the difference. Tsuga is
the Japanese word for hemlock.
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Western
Hemlock
–Tsuga heterophylla
Needles: Short,
flat, irregular, white lines below
Cones: 3/4" long,
rounded
scales
Bark: Gray,
small deep furrows
Where:
Below 4000 ft. in western Oregon and Washington
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Mountain
Hemlock
– Tsuga mertensiana
Needles: Short,
flat, spread in all
directions
Cones: 2" long, rounded
scales
Bark: Gray, small deep
furrows
Where: Above 4000 ft.
Has drooping top.
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©
2014 Ken Denniston
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