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CEGL005531 Pseudotsuga menziesii / Gaultheria shallon - Holodiscus discolor Forest

Type Concept Sentence: No Data Available

Common (Translated Scientific) Name: Douglas-fir / Salal - Oceanspray Forest

Colloquial Name: No Data Available

Hierarchy Level:  Association

Type Concept: This association occurs from sea level to about 610 m (2000 feet) elevation in the Puget Lowland, Washington, and in the Georgia Basin of British Columbia. This is an evergreen needle-leaved forest dominated by Pseudotsuga menziesii; other tree species are absent or present in small amounts, Pinus contorta being the most frequent. The understory is dominated by a relatively continuous layer of the evergreen broad-leaved shrub Gaultheria shallon, typically 0.5-1 m tall. The deciduous broad-leaved Holodiscus discolor is usually present and forms an open layer 2-5 m tall, sometimes codominated by Corylus cornuta. Herbaceous species typically occupy little cover. Other frequent species include Rosa gymnocarpa, Mahonia nervosa, Goodyera oblongifolia, Polystichum munitum, Festuca occidentalis, Pteridium aquilinum, Rubus ursinus, and Trientalis borealis ssp. latifolia. This association occurs on dry, nutrient-poor sites, with soils that are shallow to bedrock or very coarse and deep glacial outwash. It tends to occur on upper slopes or south to west aspects. This association is distinguished from similar ones by >10% cover of Gaultheria shallon, and >5% cover of Holodiscus discolor, Corylus cornuta, or Vaccinium ovatum, combined with <10% cover of Tsuga heterophylla, Thuja plicata, and Abies grandis, <20% cover of Arbutus menziesii, and <5% cover of Polystichum munitum.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: No Data Available

Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available

Floristics: This is an evergreen needle-leaved forest dominated by Pseudotsuga menziesii; other tree species are absent or present in small amounts, Pinus contorta being the most frequent. The understory is dominated by a relatively continuous layer of the evergreen broad-leaved shrub Gaultheria shallon, typically 0.5-1 m tall. The deciduous broad-leaved Holodiscus discolor is usually present and forms an open layer 2-5 m tall, sometimes codominated by Corylus cornuta. Herbaceous species typically occupy little cover. Other frequent species include Rosa gymnocarpa, Mahonia nervosa, Goodyera oblongifolia, Polystichum munitum, Festuca occidentalis, Pteridium aquilinum, Rubus ursinus, and Trientalis borealis ssp. latifolia (= Trientalis latifolia).

Dynamics:  No Data Available
Environmental Description:  This association occurs from sea level to about 610 m (2000 feet) elevation in the Puget Lowland, Washington, and in the Georgia Basin of British Columbia. This association occurs on dry, nutrient-poor sites, with soils that are shallow to bedrock or very coarse and deep glacial outwash. It tends to occur on upper slopes or south to west aspects.
Geographic Range: This association is found in Washington and British Columbia.

Nations: CA,US

States/Provinces:  BC, CA, OR, WA


Confidence Level: Low - Poorly Documented

Confidence Level Comments: No Data Available
Grank: GNR

Greasons: No Data Available
Type Name Database Code Classification Code
Class 1 Forest & Woodland Class C01 1
Subclass 1.B Temperate & Boreal Forest & Woodland Subclass S15 1.B
Formation 1.B.2 Cool Temperate Forest & Woodland Formation F008 1.B.2
Division 1.B.2.Nd Vancouverian Forest & Woodland Division D192 1.B.2.Nd
Macrogroup 1.B.2.Nd.3 Western Hemlock - Sitka Spruce - Redwood Rainforest Macrogroup M024 1.B.2.Nd.3
Group 1.B.2.Nd.3.c Douglas-fir - Western Hemlock / Salal Rainforest Group G240 1.B.2.Nd.3.c
Alliance A3379 Western Hemlock - Douglas-fir / Oceanspray Dry Forest Alliance A3379 1.B.2.Nd.3.c
Association CEGL005531 Douglas-fir / Salal - Oceanspray Forest CEGL005531 1.B.2.Nd.3.c
Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available
Synonomy: > Pseudotsuga menziesii / Gaultheria shallon - Holodiscus discolor (Chappell 1997)
> Pseudotsuga menziesii / Gaultheria shallon - Holodiscus discolor (Chappell 2001)
> Pseudotsuga menziesii / Gaultheria shallon - Holodiscus discolor (Chappell 2006b) [35 plots]
= Pseudotsuga menziesii / Gaultheria shallon - Holodiscus discolor Forest (Copass and Ramm-Granberg 2016a)
= Pseudotsuga menziesii / Gaultheria shallon - Holodiscus discolor Forest Association (Rocchio et al. 2012)
< Pseudotsuga menziesii / Gaultheria shallon (Henderson et al. 1989)
> Pseudotsuga menziesii / Gaultheria shallon (Fonda and Bernardi 1976)
= Pseudotsuga menziesii/Gaultheria shallon-Holodiscus discolor (Meidinger et al. 2005) [PNWCOAST_121]
= Pseudotsuga menziesii/Gaultheria shallon-Holodiscus discolor Forest (Crawford et al. 2009) [PNWCOAST_121]
Concept Author(s): Meidinger et al. (2005)

Author of Description: No Data Available

Acknowledgements: No Data Available

Version Date: 06-12-15
  • Agee, J. K., and R. Wasem. 1987. Stetattle Creek Research Natural Area. Federal Research Natural Areas in Oregon and Washington. Supplement No. 25. 25 pp.
  • Bourgeron, P. S., and L. D. Engelking, editors. 1994. A preliminary vegetation classification of the western United States. Unpublished report. The Nature Conservancy, Western Heritage Task Force, Boulder, CO. 175 pp. plus appendix.
  • Chappell, C. B. 1997. Terrestrial forested plant associations of the Puget Lowland. Draft report. Washington Natural Heritage Program, Washington Department of Natural Resources, Olympia. 36 pp.
  • Chappell, C. B. 2001. Draft upland forest vegetation classification for Fort Lewis Military Reservation, Washington. Unpublished report, Washington Natural Heritage Program, Washington Department of Natural Resources, Olympia, WA. . 41 pp.
  • Chappell, C. B. 2006b. Upland plant associations of the Puget Trough ecoregion, Washington. Natural Heritage Report 2006-01. Washington Department of Natural Resources, Natural Heritage Program, Olympia, WA. [http://www.dnr.wa.gov/nhp/refdesk/communities/pdf/intro.pdf]
  • Copass, C., and T. Ramm-Granberg. 2016a. Ebey’s Landing National Historical Reserve vegetation inventory and mapping project. Natural Resource Report NPS/NCCN/NRR--2016/1127. National Park Service, Fort Collins, CO. 194 pp.
  • Crawford, R. C., C. B. Chappell, C. C. Thompson, and F. J. Rocchio. 2009. Vegetation classification of Mount Rainier, North Cascades, and Olympic national parks. Plant association descriptions and identification keys: Appendices A-G. Natural Resource Technical Report NPS/NCCN/NRTR--2009/D-586. National Park Service, Fort Collins, CO. 586 pp.
  • Fonda, R. W., and J. A. Bernardi. 1976. Vegetation of Sucia Island in Puget Sound, Washington. Bulletin of the Torrey Botanical Club 103(3):99-109.
  • Franklin, J. F., and C. T. Dyrness. 1973. Natural vegetation of Oregon and Washington. General Technical Report PNW-8. USDA Forest Service, Pacific Northwest Forest and Range Experiment Station, Portland, OR. 417 pp.
  • Henderson, J. A., D. A. Peter, R. Lesher, and D. C. Shaw. 1989. Forested plant associations of the Olympic National Forest. R6-ECOL-TP-001-88. USDA Forest Service, Pacific Northwest Region, Portland, OR. 502 pp.
  • Henderson, J. A., D. A. Peter, and R. Lesher. 1986. Preliminary plant associations of the Olympic National Forest. USDA Forest Service, Pacific Northwest Region. 136 pp.
  • Meidinger, D., C. Chappell, C. Cadrin, G. Kittel, C. McCain, K. Boggs, J. Kagan, G. Cushon, A. Banner, and T. DeMeo. 2005. International Vegetation Classification of the Pacific Northwest: International correlation of temperate coastal forest plant associations of Oregon, Washington, British Columbia and Alaska. Contributors: B.C. Ministry of Forests, USDA Forest Service, B.C. Conservation Data Centre, Alaska Natural Heritage Program, Washington Natural Heritage Program, and Oregon Natural Heritage Information Center.
  • Rocchio, F. J., R. C. Crawford, and C. C. Thompson. 2012. San Juan Island National Historical Park vegetation classification and mapping project. Natural Resource Report NPS/NCCN/NRR--2012/603. National Park Service, Fort Collins, CO. 188 pp.
  • Topik, C., N. M. Halverson, and D. G. Brockway. 1986. Plant associations and management guide for the western hemlock zone. R6-ECOL-230a-1986. USDA Forest Service, Gifford Pinchot National Forest, Pacific Northwest Region, Portland, OR. 137 pp.
  • WNHP [Washington Natural Heritage Program]. 2018. Unpublished data files. Washington Natural Heritage Program, Department of Natural Resources, Olympia, WA.
  • Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.
  • del Moral, R., and J. N. Long. 1977. Classification of montane forest community types in the Cedar River drainage of western Washington, U.S.A. Canadian Journal of Forest Research 7(2):217-225.