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CEGL000071 Pseudotsuga menziesii - Chrysolepis chrysophylla / Rhododendron macrophyllum Forest
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Douglas-fir - Giant Chinquapin / Pacific Rhododendron Forest
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This association occurs in the coastal mountains of Oregon and possibly northern California. Stands occur at elevations of 540-1115 m (1780-3660 feet) on all aspects and slopes, but are commonly associated with flat sites at the upper third of slopes. These forests are characterized by a very shrubby understory. Pseudotsuga menziesii and Chrysolepis chrysophylla dominate the upper canopy layer. Important understory trees are Pseudotsuga menziesii and Notholithocarpus densiflorus (10%). Other important plants include Rhododendron macrophyllum, Mahonia nervosa, and Gaultheria shallon.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This is a broadly defined association which includes a number of locally defined types. It is possible that this association needs to be split into two or three types. Regional analysis is necessary to determine if reclassification is warranted. For now, this association includes the Pseudotsuga menziesii / Gaultheria shallon - Rhododendron macrophyllum community described by Atzet et al. (1996), as well as the following associations from Jimerson et al. (1995): Pseudotsuga menziesii - Castanopsis chrysophylla - Lithocarpus densiflorus, Pseudotsuga menziesii - Castanopsis chrysophylla - Lithocarpus densiflorus / Berberis nervosa, Pseudotsuga menziesii - Castanopsis chrysophylla / Xerophyllum tenax, Pseudotsuga menziesii - Castanopsis chrysophylla / Rhododendron macrophyllum - Berberis nervosa, Pseudotsuga menziesii - Castanopsis chrysophylla / Rhododendron macrophyllum - Gaultheria shallon, Pseudotsuga menziesii - Castanopsis chrysophylla / Rhododendron macrophyllum - Quercus sadleriana - Gaultheria shallon, Pseudotsuga menziesii - Castanopsis chrysophylla / Rhododendron macrophyllum - Quercus sadleriana / Xerophyllum tenax.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: These forests are characterized by a very shrubby understory. Pseudotsuga menziesii and Chrysolepis chrysophylla (= Castanopsis chrysophylla) dominate the upper canopy layer with 42-66% and 9-33% cover, respectively. Important understory trees are Pseudotsuga menziesii (1-20%) and Notholithocarpus densiflorus (= Lithocarpus densiflorus) (10%). Other important plants include Rhododendron macrophyllum (41%), Mahonia nervosa (= var. nervosa) (4-6%), and Gaultheria shallon (0-61%). Moss cover is can be as high as 22%.
Dynamics: No Data Available
Environmental Description: No Data Available
Geographic Range: This association occurs in the coastal mountains OF Oregon and possibly northern California.
Nations: US
States/Provinces: CA?, OR
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.684973
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.1 Warm Temperate Forest & Woodland Formation | F018 | 1.B.1 |
| Division | 1.B.1.Nc Californian Forest & Woodland Division | D007 | 1.B.1.Nc |
| Macrogroup | 1.B.1.Nc.1 California Live Oak - California Laurel - Western Cypress species Forest & Woodland Macrogroup | M009 | 1.B.1.Nc.1 |
| Group | 1.B.1.Nc.1.c Douglas-fir - Tanoak - Pacific Madrone Forest Group | G208 | 1.B.1.Nc.1.c |
| Alliance | A0106 Douglas-fir - Tanoak Forest Alliance | A0106 | 1.B.1.Nc.1.c |
| Association | CEGL000071 Douglas-fir - Giant Chinquapin / Pacific Rhododendron Forest | CEGL000071 | 1.B.1.Nc.1.c |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: ? Pseudotsuga menziesii - Castanopsis chrysophylla - Lithocarpus densiflorus / Berberis nervosa (Jimerson et al. 1995)
? Pseudotsuga menziesii - Castanopsis chrysophylla - Lithocarpus densiflorus (Jimerson et al. 1995)
? Pseudotsuga menziesii - Castanopsis chrysophylla / Rhododendron macrophyllum - Gaultheria shallon (Jimerson et al. 1995)
? Pseudotsuga menziesii - Castanopsis chrysophylla / Rhododendron macrophyllum - Quercus sadleriana - Gaultheria shallon (Jimerson et al. 1995)
? Pseudotsuga menziesii - Castanopsis chrysophylla / Rhododendron macrophyllum - Quercus sadleriana / Xerophyllum tenax (Jimerson et al. 1995)
? Pseudotsuga menziesii - Castanopsis chrysophylla / Xerophyllum tenax, Pseudotsuga menziesii - Castanopsis chrysophylla / Rhododendron macrophyllum - Berberis nervosa (Jimerson et al. 1995)
? Pseudotsuga menziesii / Gaultheria shallon - Rhododendron macrophyllum community (Atzet et al. 1996)
? Pseudotsuga menziesii - Castanopsis chrysophylla - Lithocarpus densiflorus (Jimerson et al. 1995)
? Pseudotsuga menziesii - Castanopsis chrysophylla / Rhododendron macrophyllum - Gaultheria shallon (Jimerson et al. 1995)
? Pseudotsuga menziesii - Castanopsis chrysophylla / Rhododendron macrophyllum - Quercus sadleriana - Gaultheria shallon (Jimerson et al. 1995)
? Pseudotsuga menziesii - Castanopsis chrysophylla / Rhododendron macrophyllum - Quercus sadleriana / Xerophyllum tenax (Jimerson et al. 1995)
? Pseudotsuga menziesii - Castanopsis chrysophylla / Xerophyllum tenax, Pseudotsuga menziesii - Castanopsis chrysophylla / Rhododendron macrophyllum - Berberis nervosa (Jimerson et al. 1995)
? Pseudotsuga menziesii / Gaultheria shallon - Rhododendron macrophyllum community (Atzet et al. 1996)
- Atzet, T. A., D. E. White, L. A. McCrimmon, P. A. Martinez, P. R. Fong, and V. D. Randall. 1996. Field guide to the forested plant associations of southwestern Oregon. Technical Paper R6-NR-ECOL-TP-17-96. USDA Forest Service, Pacific Northwest Region, Portland, OR.
- Atzet, T., and D. L. Wheeler. 1984. Preliminary plant associations of the Siskiyou Mountains Province, Siskiyou National Forest. USDA Forest Service, Pacific Northwest Region, Portland, OR.
- 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.
- Jimerson, T. J., L. D. Hoover, E. A. McGee, G. DeNitto, and R. M. Creasy. 1995. A field guide to serpentine plant associations and sensitive plants in northwestern California. Technical Publication R5-ECOL-TP-006. USDA Forest Service, Pacific Southwest Region, San Francisco, CA.
- 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.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.