Vascular Plants - Pinaceae - Pseudotsuga:
Pseudotsuga menziesii
Page Author: Don Knoke
Douglas fir 
Blooms: April - May
Habit: tree
Duration: perennial
Origin: Native
Distribution: British Columbia to California, east to Alberta and Colorado
Habitat: Moist to dry areas from sea level to mid-elevations in the mountains, occasionally to timberline
Species Description:

General: Giant forest trees up to 90 m. tall, with drooping branches and erect leader.
Bark: Bark dark brown, rough, ultimately very thick; branchlets pubescent for several years.
Leaves: Needles 2-3 cm. long, yellow-green to bluish-green, retained 7-10 years; two white stripes on the underside of the needles, none above.
Cones: Staminate cones sessile, 6-10 mm. long, yellow to reddish; ovulate cones ovoid, deciduous as a unit, 4-10 cm. long, pendent, yellowish- to purplish-green when young, becoming reddish-brown, soon deciduous; the bracts long-exerted, 4-7 mm. broad across the 3-lobed tip, the middle lobe much the longest.
Subspecies & Varieties:
Accepted Name:
Pseudotsuga menziesii (Mirbel) Franco
Synonyms:
(none)

Treated in Flora of the PNW as:
Pseudotsuga menziesii
Additional Resources:

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

WTU Herbarium Specimens: View list of Pseudotsuga menziesii specimens in the WTU Herbarium database.

Washington Flora Checklist: Pseudotsuga menziesii treatment.

E-Flora BC: Pseudotsuga menziesii atlas page.

CalPhotos: Pseudotsuga menziesii images.

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

Clayton J. Antieau, 1995

Clayton J. Antieau, 2002

Ben Legler, 2004

Ben Legler, 2004

Jim Riley

Ben Legler, 2005

Ben Legler, 2003

Ben Legler, 2003

Ben Legler, 2004

Ben Legler, 2004

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

G. D. Carr, 2003

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, 2006

G. D. Carr, 2006

G. D. Carr, 1976

G. D. Carr, 2010

Paul Slichter, 2005

Paul Slichter, 2005

Regina Johnson, 2012

Regina Johnson, 2012

Ben Legler, 2008

Ben Legler, 2008

Ben Legler, 2008

Susan McDougall, 2013

Susan McDougall, 2011

Susan McDougall

Brian Luther, 2014

Susan McDougall, 2015

Roger T. George, 2015

Brian Luther, 2016

Brian Luther, 2016

Brian Luther, 2016

Brian Luther, 2016

Brian Luther, 2016

Brian Luther, 2016

Brian Luther, 2016

Roger T. George, 2016
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