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CEGL005544 Pseudotsuga menziesii - Tsuga heterophylla / Rhododendron macrophyllum Forest
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Douglas-fir - Western Hemlock / Pacific Rhododendron Forest
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This Douglas-fir - western hemlock forest of Washington and Oregon has a canopy dominated by Pseudotsuga menziesii and Tsuga heterophylla. Both are always present and the latter dominates tree regeneration. The well-developed shrub layer is dominated or codominated by Rhododendron macrophyllum. Gaultheria shallon and Mahonia nervosa are usually present and either can codominate. The herb layer varies from sparse to well-developed; when prominent it is dominated by Xerophyllum tenax. Linnaea borealis is often present. If Polystichum munitum is present, it has less than 3% cover. This association occurs at low to moderate elevations on mid to upper slopes, ridgetops, and benches, especially on south to west aspects. Sites have dry, well-drained soils that are often shallow or very rocky.
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: The canopy is dominated by Pseudotsuga menziesii and Tsuga heterophylla. Both are always present and the latter dominates tree regeneration. The well-developed shrub layer is dominated or codominated by Rhododendron macrophyllum. Gaultheria shallon and Mahonia nervosa (= Berberis nervosa) are usually present and either can codominate. The herb layer varies from sparse to well-developed; when prominent it is dominated by Xerophyllum tenax. Linnaea borealis is often present. If Polystichum munitum is present, it has less than 3% cover.
Dynamics: No Data Available
Environmental Description: No Data Available
Geographic Range: No Data Available
Nations: US
States/Provinces: OR, WA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.942454
Confidence Level: Low - Poorly Documented
Confidence Level Comments: No Data Available
Grank: G4
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 | A3378 Western Hemlock - Douglas-fir / Western Cordilleran Bunchberry Mesic Forest Alliance | A3378 | 1.B.2.Nd.3.c |
| Association | CEGL005544 Douglas-fir - Western Hemlock / Pacific Rhododendron Forest | CEGL005544 | 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-Tsuga heterophylla/Rhododendron macrophyllum (Meidinger et al. 2005) [PNWCOAST_197]
= Pseudotsuga menziesii-Tsuga heterophylla/Rhododendron macrophyllum Forest (Crawford et al. 2009) [PNWCOAST_197]
< Tsuga heterophylla / Rhododendron macrophyllum (Henderson et al. 1989)
< Tsuga heterophylla / Rhododendron macrophyllum (Kagan et al. 2004)
> Western hemlock / rhododendron - dwarf Oregon-grape (TSHE/RHMA-BENE) (Hemstrom and Logan 1986)
> Western hemlock / rhododendron - evergreen huckleberry (TSHE/RHMA-VAOV2) (Hemstrom and Logan 1986)
> Western hemlock / rhododendron - salal (TSHE/RHMA-GASH) (Hemstrom and Logan 1986)
> Western hemlock / rhododendron / swordfern (TSHE/RHMA/POMU) (Hemstrom and Logan 1986)
= Pseudotsuga menziesii-Tsuga heterophylla/Rhododendron macrophyllum Forest (Crawford et al. 2009) [PNWCOAST_197]
< Tsuga heterophylla / Rhododendron macrophyllum (Henderson et al. 1989)
< Tsuga heterophylla / Rhododendron macrophyllum (Kagan et al. 2004)
> Western hemlock / rhododendron - dwarf Oregon-grape (TSHE/RHMA-BENE) (Hemstrom and Logan 1986)
> Western hemlock / rhododendron - evergreen huckleberry (TSHE/RHMA-VAOV2) (Hemstrom and Logan 1986)
> Western hemlock / rhododendron - salal (TSHE/RHMA-GASH) (Hemstrom and Logan 1986)
> Western hemlock / rhododendron / swordfern (TSHE/RHMA/POMU) (Hemstrom and Logan 1986)
- Atzet, T., and L. A. McCrimmon. 1990. Preliminary plant associations of the southern Oregon Cascade Mountain Province. USDA Forest Service, Pacific Northwest Region, Siskiyou National Forest, Grants Pass, OR. 330 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.
- 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.
- Dyrness, C. T., J. F. Franklin, and W. H. Moir. 1974a. A preliminary classification of forest communities in the central portion of the western Cascades of Oregon. Coniferous Forest Biome Bulletin 4:1-123.
- Halverson, N. M., C. Topik, and R. van Vickle. 1986. Plant association and management guide for the western hemlock zone Mt. Hood National Forest. R6-ECOL-232A-1986. USDA Forest Service, Pacific Northwest Region, Portland, OR. 111 pp.
- Hemstrom, M. A., S. E. Logan, and W. Pavlat. 1987. Plant association and management guide, Willamette National Forest. Report R6-Ecol 257-B-86. USDA Forest Service, Pacific Northwest Region, Portland, OR. 312 pp.
- Hemstrom, M. A., W. H. Emmingham, N. M. Halverson, S. E. Logan, and C. Topik. 1982. Plant association and management guide for the pacific silver fir zone, Mt. Hood and Willamette national forests. R6-Ecol 100-1982a. USDA Forest Service, Pacific Northwest Region, Portland, OR. 104 pp.
- Hemstrom, M. A., and S. E. Logan. 1986. Plant association and management guide Siuslaw National Forest. Report R6-Ecol 220-1986a. USDA Forest Service, Pacific Northwest Region, Portland, OR. 121 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.
- Kagan, J. S., J. A. Christy, M. P. Murray, and J. A. Titus. 2004. Classification of native vegetation of Oregon. January 2004. Oregon Natural Heritage Information Center, Portland. 52 pp.
- McCain, C., and N. M. Diaz. 2002a. Field guide to the forested plant associations of the northern Oregon Coast Range. Siuslaw National Forest, USFS; Salem District, BLM; Eugene District, BLM. Technical Paper R6-NR-ECOL-TP-03-02. USDA Forest Service, Pacific Northwest Region, Portland, OR. 250 pp.
- McCain, C., and N. M. Diaz. 2002b. Field guide to the forested plant associations of the westside central Cascades of northwest Oregon. Willamette N.F., USFS; Mt. Hood N.F., USFS; Salem District, BLM; Eugene District, BLM. Technical Paper R6-NR-ECOL-TP-02-02. USDA Forest Service, Pacific Northwest Region, Portland, OR.
- 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.
- Moir, W. H., C. Maser, and J. F. Franklin. 1973b. Bagby Research Natural Area. Supplement #2 to: J. F. Franklin, C. T. Dyrness, and C. Maser. 1972. Federal Research Natural Areas in Oregon and Washington: A guidebook for scientists and educators. USDA Forest Service, Pacific Northwest Forest and Range Experiment Station, Portland, OR.
- 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.