Print Report
CEGL000206 Pinus ponderosa / Wyethia mollis Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Ponderosa Pine / Woolly Mule''s-ears Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This is an open woodland found in the eastern Cascades ecoregion in south-central Oregon. This association occurs at elevations between 1525 and 1950 m (5000-6400 feet) in eastern Oregon. Slopes vary from 5-40%. Sites are usually on convex topography over andesite, basalt, or rhyolite. Soils are gravelly silt loams to gravelly clay, and are well-drained. Pinus ponderosa is the major tree cover, varying from 5-50%. Abies lowiana often occurs at the upper elevational phases of this association but remains <10% cover. Juniperus occidentalis may occur at <10% cover. Wyethia mollis occurs at <30% cover except in recently disturbed sites where it may be over 50% cover. Other shrubs usually found are Purshia tridentata and Amelanchier alnifolia usually exist at low cover values. Achillea millefolium is usually found up to 10% cover. A number of other forbs and grasses can be found. No single grass species (Elymus elymoides and Poa nervosa) covers more than 10%.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This type has only been described in one study by Hopkins (1979a). While this is reportedly a climax type, it is possible that it represents an overgrazed Pinus ponderosa / bunchgrass or bitterbrush community. However, until some areas with this type are protected and change, it is assumed that the classification is correct.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: Pinus ponderosa is the major tree cover, varying from 5-50%. Abies lowiana (= Abies concolor var. lowiana) often occurs at the upper elevational phases of this association but remains <10% cover. Juniperus occidentalis may occur at <10% cover. Wyethia mollis occurs at <30% cover except in recently disturbed sites where it may be over 50% cover. Other shrubs usually found are Purshia tridentata and Amelanchier alnifolia usually exist at low cover values. Achillea millefolium is usually found up to 10% cover. A number of other forbs and grasses can be found. No single grass species (Elymus elymoides and Poa nervosa) covers more than 10%.
Dynamics: No Data Available
Environmental Description: This is an open woodland found in the eastern Cascades ecoregion in south-central Oregon. This association occurs at elevations between 1525 and 1950 m (5000-6400 feet) in eastern Oregon. Slopes vary from 5-40%. Sites are usually on convex topography over andesite, basalt, or rhyolite. Soils are gravelly silt loams to gravelly clay, and are well-drained.
Geographic Range: This association occurs on the Bly and Lakeview Ranger Districts of the Fremont National Forest and almost certainly occurs on the Modoc National Forest in adjacent California.
Nations: US
States/Provinces: CA?, OR
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.686825
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G2Q
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 | A3447 Ponderosa Pine / Herbaceous Understory Central Rocky Mountain Open Woodland Alliance | A3447 | 1.B.2.Nb.2.a |
| Association | CEGL000206 Ponderosa Pine / Woolly Mule''s-ears Woodland | CEGL000206 | 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 / Wooly Wyethia (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.
- 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.