Page authors: Don Knoke, David Giblin
Pseudotsuga menziesii
Douglas-fir
WTU specimens
Other herbaria

Distribution: Widely distributed in forested areas on both sides of the Cascades crest in Washington; 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.

Cones: April-May

Origin: Native

Conservation Status: Not of concern

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.

Accepted Name:
Pseudotsuga menziesii (Mirb.) Franco
Publication: Bol. Soc. Brot. ser. 2, 24: 74. 1950.

Synonyms & Misapplications:
Abies menziesii Mirb.
Abies mucronata Raf.
Abies taxifolia Poir.
Pinus taxifolia Lamb.
Pseudotsuga douglasii (Lindl.) Carrière
Pseudotsuga mucronata (Raf.) Sudw.
Pseudotsuga taxifolia (Lamb.) Britton
Infraspecies:
var. glauca – pino real Colorado, Rocky Mountain Douglas-fir    Occurring from Okanogan County to the eastern counties in Washington; central British Columbia to Mexico, east to the Rocky Mountains.
var. menziesii – coast Douglas-fir    Occurring from the Pacific coast to the east base of the Cascades in Washington. British Columbia to California, east to Washington, Oregon, and western Nevada.
Additional Resources:

PNW Herbaria: Specimen records of Pseudotsuga menziesii in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Pseudotsuga menziesii checklist entry.

E-Flora BC: Pseudotsuga menziesii atlas page.

CalPhotos: Pseudotsuga menziesii photos.

USDA Plants: Pseudotsuga menziesii information.

63 photographs:
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