The Hemlocks of the Columbia River Gorge
The Genus Tsuga
The upper portion of mountain hemlock as seen
at treeline at Crystal Lake on the western slopes of Mt. Adams................September
25, 2005. This species may be found from about 4000' up to treeline.
Western Hemlock: Tsuga
heterophylla -
Mountain Hemlock: Tsuga
mertensiana -
Paul Slichter