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CEGL000178 Pinus ponderosa / Artemisia tridentata - Purshia tridentata Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Ponderosa Pine / Big Sagebrush - Antelope Bitterbrush Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This association is a fairly open woodland with a shrub and grass mosaic understory. The tree canopy is composed of Pinus ponderosa often with Juniperus occidentalis. Shrubs include Purshia tridentata and Artemisia tridentata. The bunchgrasses Festuca idahoensis and Elymus elymoides are found in the herbaceous layer. This association is known only from the southern Oregon portions of the East Cascades and Modoc Plateau, and possibly in adjacent California, and occurs on sites at 780-1710 m (2550-5600 feet) elevation. Soils are sand or loam to clay-loam in texture and are underlain by pumice, lava, and basalt. Stands occur on all aspects and slopes up to 55%.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: Volland (1976) categorized this community in two separate associations, Ponderosa pine / bitterbrush-sagebrush / squirreltail and Ponderosa pine/ bitterbrush-sagebrush / fescue. Hopkins (1979b) refers to it as Ponderosa pine / bitterbrush-big sagebrush / fescue. It is similar to Smith''s (1994b) yellowpine / sagebrush-bitterbrush community except for the absence of Pinus jeffreyi.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: This association is a fairly open woodland with a shrub and grass mosaic understory. The tree canopy is composed of Pinus ponderosa often with Juniperus occidentalis, both with 1-30% cover. Shrubs include Purshia tridentata (1-30% cover) and Artemisia tridentata (0-50% cover). The bunchgrasses Festuca idahoensis and Elymus elymoides (= Sitanion hystrix) support cover of 0-30% and 0-10%, respectively.
Dynamics: No Data Available
Environmental Description: This association is known only from the southern Oregon portions of the East Cascades and Modoc Plateau, and possibly in adjacent California, and occurs on sites at 780-1710 m (2550-5600 feet) elevation. Soils are sand or loam to clay-loam in texture and are underlain by pumice, lava, and basalt. Stands occur on all aspects and slopes up to 55%.
Geographic Range: This association is known only from the southern Oregon portions of the East Cascades and Modoc Plateau. Possibly occurs in adjacent California, but described similar associations are significantly different.
Nations: US
States/Provinces: CA?, OR
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.684573
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G3
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 | CEGL000178 Ponderosa Pine / Big Sagebrush - Antelope Bitterbrush Woodland | CEGL000178 | 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: > Ponderosa Pine / Bitterbrush - Sagebrush / Fescue (Volland 1976)
> Ponderosa Pine / Bitterbrush - Sagebrush / Squirreltail (Volland 1976)
? Ponderosa pine / bitterbrush-big sagebrush / fescue (Hopkins 1979b)
? yellowpine / sagebrush-bitterbrush community (Smith 1994b) [similar except for the presence of Pinus jeffreyi.]
> Ponderosa Pine / Bitterbrush - Sagebrush / Squirreltail (Volland 1976)
? Ponderosa pine / bitterbrush-big sagebrush / fescue (Hopkins 1979b)
? yellowpine / sagebrush-bitterbrush community (Smith 1994b) [similar except for the presence of Pinus jeffreyi.]
- 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. 1979b. Plant associations of South Chiloquin and Klamath Ranger Districts - Winema National Forest. Publication R6-ECOL-79-005. USDA Forest Service, Pacific Northwest Region, Portland, OR. 96 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.
- Smith, S. 1994b. Ecological guide to eastside pine plant associations, northeastern California. R5-ECOL-TP-004. USDA Forest Service, Pacific Southwest Region, San Francisco, CA. 174 pp.
- Volland, L. A. 1976. Plant communities of the central Oregon pumice zone. USDA Forest Service R-6 Area Guide 4-2. Pacific Northwest Region, Portland, OR. 113 pp.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.