Hemlocks of the Columbia River Gorge of Oregon and Washington
The Genus Tsuga
The upper portion of mountain hemlock (Tsuga mertensiana) 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, Pacific Hemlock, Lowland Hemlock: Tsuga
heterophylla (Synonym: Abies heterophylla) -
Black Hemlock, Mountain Hemlock: Tsuga
mertensiana (Synonyms: Abies hookeriana, Abies mertensiana, Hesperopeuce mertensiana, Picea hookeriana, Tsuga crassifolia, Tsuga mertensiana ssp. mertensiana) -
Paul Slichter