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CEGL000065 Pinus lambertiana - Pinus ponderosa - Pseudotsuga menziesii / Festuca californica Forest
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Sugar Pine - Ponderosa Pine - Douglas-fir / California Fescue Forest
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This mixed conifer association of the Siskiyou Mountains in southwestern Oregon is dominated by Pinus ponderosa and Pseudotsuga menziesii, both with low cover. Pinus lambertiana is a constant canopy associate found at low cover. The regeneration layer is dominated by Pinus ponderosa, with Pseudotsuga menziesii frequently occurring. Pinus lambertiana, Calocedrus decurrens, Abies lowiana, and Quercus chrysolepis also commonly occur in the regeneration layer. Arbutus menziesii, Quercus garryana, Chrysolepis chrysophylla, and Acer macrophyllum are rarely present. Toxicodendron diversilobum is the only commonly occurring shrub. Madia madioides and Iris chrysophylla commonly occur, while Festuca californica and Fragaria vesca are occasional. Moss cover averages 4%. Average elevation for this association is 930 m (3050 feet); aspect is variable, though generally not north. Slopes average 32%, with a range of 15-65%. Slope position ranges from midslope to ridgetop. Parent materials are composed of andesite, basalt, mixed ultramafics, schist and diorite. Surface texture is loam, with 20-40% gravel and cobbles. Subsurface texture is loam with 60% cobbles.
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 mixed conifer association of the Siskiyou Mountains in southwestern Oregon is dominated by Pinus ponderosa and Pseudotsuga menziesii, both with low cover, averaging 16% and 17%, respectively. Pinus lambertiana is a constant canopy associate found at low cover. The regeneration layer is dominated by Pinus ponderosa, with Pseudotsuga menziesii frequently occurring. Pinus lambertiana, Calocedrus decurrens, Abies lowiana (= Abies concolor var. lowiana), and Quercus chrysolepis also commonly occur in the regeneration layer. Arbutus menziesii, Quercus garryana, Chrysolepis chrysophylla, and Acer macrophyllum are rarely present. Toxicodendron diversilobum is the only commonly occurring shrub. Madia madioides and Iris chrysophylla commonly occur, while Festuca californica and Fragaria vesca are occasional. Moss cover averages 4%.
Dynamics: No Data Available
Environmental Description: Average elevation for this association is 930 m (3050 feet); aspect is variable, though generally not north. Slopes average 32%, with a range of 15-65%. Slope position ranges from midslope to ridgetop. Parent materials are composed of andesite, basalt, mixed ultramafics, schist and diorite. Surface texture is loam, with 20-40% gravel and cobbles. Subsurface texture is loam with 60% cobbles.
Geographic Range: This association occurs across the Siskiyou Mountains in southwestern Oregon.
Nations: US
States/Provinces: CA?, OR
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.685396
Confidence Level: Moderate
Confidence Level Comments: No Data Available
Grank: G1
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.2 Incense-cedar - Jeffrey Pine - Sierra White Fir Forest Macrogroup | M023 | 1.B.2.Nd.2 |
| Group | 1.B.2.Nd.2.a Incense-cedar - Sugar Pine - Sierra White Fir Forest & Woodland Group | G344 | 1.B.2.Nd.2.a |
| Alliance | A3673 Ponderosa Pine - Incense-cedar - Douglas-fir Forest Alliance | A3673 | 1.B.2.Nd.2.a |
| Association | CEGL000065 Sugar Pine - Ponderosa Pine - Douglas-fir / California Fescue Forest | CEGL000065 | 1.B.2.Nd.2.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Pseudotsuga menziesii - Pinus ponderosa (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.
- 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.
- ORNHP [Oregon Natural Heritage Program]. No date. Unpublished data files. Oregon Natural Heritage Program, The Nature Conservancy, Portland, OR.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.