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Douglas-fir - Pseudotsuga menziesii

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Global Rank: G5
State Rank: S5
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:

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State Rank Reason (see State Rank above)
See rank details.
  • Details on Status Ranking and Review
    Douglas-fir (Pseudotsuga menziesii) Conservation Status Review
    Review Date = 05/24/2012
    Population Size

    Score0 - Large: Generally >100,000 individuals.

    Comment

    Range Extent

    Score0 - Widespread species within Montana (occurs in 5% or more of the state or generally occurring in 6 or more sub-basins.) as well as outside of Montana.

    Comment

    Area of Occupancy

    Score0 - High: Occurs in >25 Subwatersheds (6th Code HUC’s).

    Comment

    Trends

    Score0 - Stable or Increasing: Population size, range, and/or available habitat stable, increasing or fluctuating in the recent past (approximately 30 years).

    Comment

    Threats

    Score0 - Low: Impacts, if any, to the species are expected to be minor or insignificant (affecting <10% of populations) in severity, scope and immediacy.

    Comment

    Intrinsic Vulnerability

    Score0 - Low Vulnerability: Species does not have any unusual or specific life history or biological attributes or limted reproductive potential which makes it susceptible to extirpation from stochastic events or other adverse impacts to its habitat and thus slow to recover.

    Comment

    Environmental Specificity

    Score0 - Low: Species is a generalist that occurs in a variety of habitats and/or is tolerant of disturbed or degraded habitats (C -Values of 1-4).

    Comment

    Raw Conservation Status Score

    Score 0 total points scored out of a possible 19.

 
General Description
Evergreen trees up to 60 m tall with spreading branches and narrow to broadly conical crowns. Bark of older trees thick, furrowed and gray with reddish brown between furrows. Leaves yellow- to blue-green, single, spirally arranged and spreading, 15–25 mm long, stomates lacking on upper surface. Leaf buds conical. Seed cones narrowly ellipsoidal, 3–6 cm long, maturing the first season and shed entire. Scales broadly rhombic, stiff, pubescent, subtended by a longer 3-lobed bract. Seeds winged. Our plants are var. glauca (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

General Distribution
Mapped Observations

 


Distribution Comments
In MT across the western two-thirds of the state; BC to AB south to CA, TX, and Mexico (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 1389

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Records associated with a range of dates are excluded from time charts)



Habitat
Dry to mesic forests; valleys to subalpine and on the plains along the Missouri River (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
  • Additional ReferencesLegend:   View WorldCat Record   View Online Publication
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    • Artley, D. K. 1978. Predicting duff reduction from broadcast burning in western larch/Douglas fir stands. M.S. Thesis, University of Montana, Missoula.
    • Lesica, P. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX.
    • Little, E.L., Jr. 1979. Checklist of United States trees (native and naturalized). Agriculture Handbook No. 541. U.S. Forest Service, Washington, D.C. 375 pp.
    • Steinberg, P. D. 2002. Pseudotsuga menziesii var. glauca. In: Fire Effects Information System, [Online}. U. S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer).
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Citation for data on this website:
Douglas-fir — Pseudotsuga menziesii.  Montana Field Guide.  Montana Natural Heritage Program.  Retrieved on July 25, 2014, from http://FieldGuide.mt.gov/detail_PGPIN05020.aspx
 
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