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CEGL000180 Pinus ponderosa / Artemisia tridentata ssp. vaseyana / Poa nervosa Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Ponderosa Pine / Mountain Big Sagebrush / Hooker''s Bluegrass Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This woodland is reported from the Fremont National Forest in Oregon. Elevation ranges from 1770 to 2135 m (5800-7000 feet). Aspect is south to northwest. Slope is 1-25% and slope position is the lower to upper one-third. The topography is flat to convex and also ridgetops. Soils are ash over basalt, andesite and loess. Pinus ponderosa is the most common tree, but Juniperus occidentalis is often found. Pinus contorta and Abies lowiana occur occasionally. Artemisia tridentata ssp. vaseyana occurs in all stands and Symphoricarpos albus and Ribes cereum are common. Common herbaceous species include Poa nervosa, Lupinus argenteus, Achillea millefolium, Elymus elymoides, Carex pensylvanica, Festuca idahoensis, Fragaria virginiana, and Hieracium albiflorum. Fire is important in these forests to maintain the open nature of the forest, with scattered large Pinus ponderosa trees and limited shrub cover.
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: Pinus ponderosa is the most common tree, but Juniperus occidentalis is often found. Pinus contorta and Abies lowiana (= Abies concolor var. lowiana) occur occasionally. Artemisia tridentata ssp. vaseyana occurs in all stands and Symphoricarpos albus and Ribes cereum are common. Common herbaceous species include Poa nervosa, Lupinus argenteus, Achillea millefolium, Elymus elymoides, Carex pensylvanica, Festuca idahoensis, Fragaria virginiana, and Hieracium albiflorum.
Dynamics: Fire is important in these forests to maintain the open nature of the forest, with scattered large Pinus ponderosa trees and limited shrub cover.
Environmental Description: This woodland is reported from the Fremont National Forest in Oregon. Elevation ranges from 1770 to 2135 m (5800-7000 feet). Aspect is south to northwest. Slope is 1-25% and slope position is the lower to upper one-third. The topography is flat to convex and also ridgetops. Soils are ash over basalt, andesite and loess.
Geographic Range: This association is restricted to southern Oregon east of the Cascades. It is restricted to relatively high-elevation sites with soils rich in pumice. These abiotic requirements cause this association to once have been a common forest type.
Nations: US
States/Provinces: OR
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.686748
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G2G3
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.Nb Rocky Mountain Forest & Woodland Division | D194 | 1.B.2.Nb |
| Macrogroup | 1.B.2.Nb.2 Ponderosa Pine - Douglas-fir - Limber Pine Central Rocky Mountain Dry Forest Macrogroup | M501 | 1.B.2.Nb.2 |
| Group | 1.B.2.Nb.2.a Ponderosa Pine Central Rocky Mountain Open Woodland Group | G213 | 1.B.2.Nb.2.a |
| Alliance | A3446 Ponderosa Pine / Shrub Understory Central Rocky Mountain Woodland Alliance | A3446 | 1.B.2.Nb.2.a |
| Association | CEGL000180 Ponderosa Pine / Mountain Big Sagebrush / Hooker''s Bluegrass Woodland | CEGL000180 | 1.B.2.Nb.2.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Pinus ponderosa / Artemisia tridentata ssp. vaseyana / Poa nervosa (Hopkins 1979a)
- 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.
- Hopkins, W. E. 1979a. Plant associations of the Fremont National Forest. Technical Report R6-ECOL-79-004. USDA Forest Service, Pacific Northwest Region, Portland.
- Johnson, C. G., and R. R. Clausnitzer. 1992. Plant associations of the Blue and Ochoco mountains. R6-ERW-TP-036-92. USDA Forest Service, Pacific Northwest Region, Wallowa-Whitman National Forest. 163 pp. plus appendices.
- 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.