Vascular Plants - Cupressaceae - Thuja:
Thuja plicata
Page Authors: Don Knoke, David Giblin
western red cedar, canoe cedar 
Blooms: Producing cones in April-May
Habit: tree
Duration: perennial
Origin: Native
Conservation Status: Abundant; of no concern.

Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to northern California, east to Alberta, Idaho, and Montana.
Habitat: Moist or swampy areas from sea level to mid-elevations in the mountains.
Species Description:

General: Monoecious, large to huge trees up to 70 m. tall, in age strongly fluted and buttressed at the base.
Bark: Bark thin, reddish-brown, longitudinally ridged and fissured, peeling off into long, fibrous strips.
Leaves: Leaders slender and drooping, the branches spreading, the ultimate branchlets flattened, at first lustrous, but browning in 3-4 years; leaves scale-like, opposite in 4 rows, the lateral leaves keeled.
Cones: Staminate cones numerous, sub-globose, 2 mm. long, tipping many short branchlets, the stamens in 4 pairs; ovulate cones solitary on the ends of short branches, ellipsoid, at first bluish, becoming brown and 8-10 mm. long at maturity.
Accepted Name:
Thuja plicata Donn ex D. Don in Lambert
Synonyms:
Thuja plicata Donn.
Thuja plicata Donn ex D. Don
Thuja plicata Donn ex D. Don in Lambert
Thuja plicata D. Don
Thuja plicata Donn ex D. Don in Lamb

Treated in Flora of the PNW as:
Thuja plicata
Additional Resources:

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

WTU Herbarium Specimens: View list of Thuja plicata specimens in the WTU Herbarium database.

Washington Flora Checklist: Thuja plicata treatment.

E-Flora BC: Thuja plicata atlas page.

CalPhotos: Thuja plicata images.

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

Clayton J. Antieau, 1990

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Clayton J. Antieau, 2002

Clayton J. Antieau, 2004

H. Tim Gladwin, 1982

H. Tim Gladwin, 1982

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Rod Gilbert

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

G. D. Carr, 2010

G. D. Carr, 2010

G. D. Carr, 2010

Robert L. Carr, 2010

Ben Legler, 2012

Ben Legler, 2012

Ben Legler, 2012

Susan McDougall, 2013

Brian Luther, 2011

Brian Luther, 2011

Susan McDougall, 2014
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Washington Native Plant Society
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