Black Hemlock, Mountain Hemlock
Tsuga mertensiana
Synonyms: Abies hookeriana, Abies mertensiana, Hesperopeuce mertensiana, Picea hookeriana, Tsuga crassifolia, Tsuga mertensiana ssp. mertensiana
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Mountain hemlock as seen (at left and center) along the Pacific Crest Trail near Timberline Lodge, Mt. Hood, OR.........October 19, 2010. Note the drooping top to several of the trees. The image at right shows mountain hemlock (with Mount Adams in the distance behind it) along the Sawtooth Trail #107 downhill to the north of the Sawtooth Mountain summit, Indian Heaven Wilderness......September 15, 2025.
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Male pollen cones of mountain hemlock observed along the Timberline Trail south of the junction with the Umbrella Falls Trail #667, Mount Hood National Forest.....July 2, 2025.
The photo above shows an unopened and open cone of mountain
hemlock as seen near treeline along the Round the Mt. Trail #9 at the Aiken
Lava Flow on the southern slopes of Mt. Adams.......October 22, 2005.
The cones of mountain hemlock measure from 2.5-7 cm long, while those of the western hemlock measure from 1.5-2.5 cm long.
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Mountain hemlock as seen at left atop Bull of the Woods Mountain, Bull of the Woods Wilderness........September 14, 2018. The photo at right shows a view of the needle pattern atop a branch of mountain hemlock as seen at Grand Meadows, Indian Heaven Wilderness......September 15, 2023.
Paul Slichter