Vascular Plants - Pinaceae - Tsuga:
Tsuga heterophylla
Page Author: Don Knoke
western hemlock, Pacific hemlock, lowland hemlock 
Blooms: May - June
Habit: tree
Duration: perennial
Origin: Native
Distribution: Alaska to California, east to Montana, but much more common west of the Cascades
Habitat: Moist, deep forests from sea level to mid-elevations in the mountains
Species Description:

General: Trees to 50 m. tall, with a narrow crown, the leader and branches drooping.
Bark: Bark dark brown to reddish-brown, becoming thick and furrowed, cross-ridged to form small scales; young branches with both short and long pubescence.
Leaves: Needles flat, grooved, glossy yellow-green on the upper surface, white over most of the lower surface, 8-20 mm. long, highly variable in length, spread at right angles to the branches.
Cones: Staminate cones yellow, 3-4 mm. long, on short stalks near the branch tips; ovulate cones ovoid, 1.5-2.5 cm. long, greenish, becoming brown, single at the branch tips.
Accepted Name:
Tsuga heterophylla (Raf.) Sarg.
Synonyms:
Abies heterophylla Raf.

Treated in Flora of the PNW as:
Tsuga heterophylla
Additional Resources:

PNW Herbaria Specimens: View list of all Tsuga heterophylla specimens in the Consortium of Pacific Northwest Herbaria database.

WTU Herbarium Specimens: View list of Tsuga heterophylla specimens in the WTU Herbarium database.

Washington Flora Checklist: Tsuga heterophylla treatment.

E-Flora BC: Tsuga heterophylla atlas page.

CalPhotos: Tsuga heterophylla images.

USDA Plants Database: Tsuga heterophylla.
Additional photographs of Tsuga heterophylla:
(click on a thumbnail to view larger photo)

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

H. Tim Gladwin, 1982

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

G. D. Carr, 2010

G. D. Carr, 2010

G. D. Carr, 2010

G. D. Carr, 2010

G. D. Carr, 2010

G. D. Carr, 2010

G. D. Carr, 2010

Robert L. Carr, 2010

Craig Althen, 2010

Ben Legler, 2010

Brian Luther, 2015

Brian Luther, 2015

Susan McDougall, 2014

Robert L. Carr, 2012

Brian Luther, 2016
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Washington Native Plant Society
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