Print Report
CEGL000179 Pinus ponderosa / Artemisia tridentata ssp. wyomingensis / Hesperostipa comata Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Ponderosa Pine / Wyoming Big Sagebrush / Needle-and-Thread Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: These are open, sparse woodlands on isolated sand dunes and sandy flats. The only two known occurrences are from the northern Great Basin, one in Oregon and one in California. They represent isolated Pinus ponderosa forests in sagebrush habitats, which are apparently Pleistocene relicts from a more mesic environment. The canopy is dominated by Pinus ponderosa at fairly low cover (averaging 4% canopy cover), making this a shrubland with scattered trees. On the margins, occasional Juniperus occidentalis individuals represent the only other tree found, and in patches these can be codominant. The majority of the shrub cover is from Artemisia tridentata ssp. wyomingensis and Chrysothamnus viscidiflorus. Dominant grasses are Hesperostipa comata, Achnatherum thurberianum, Achnatherum hymenoides, Poa secunda, and Elymus elymoides. This is the only Pinus ponderosa association with Artemisia tridentata and Hesperostipa comata found on sandy habitats. ~Pinus ponderosa / Artemisia tridentata ssp. vaseyana / Poa nervosa Woodland (CEGL000180)$$ has been described from higher elevations and silty soils.
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: The canopy is dominated by Pinus ponderosa at fairly low cover (averaging 4% canopy cover), making this a shrubland with scattered trees. On the margins, occasional Juniperus occidentalis individuals represent the only other tree found, and in patches these can be codominant. The majority of the shrub cover is from Artemisia tridentata ssp. wyomingensis and Chrysothamnus viscidiflorus. Dominant grasses are Hesperostipa comata (= Stipa comata), Achnatherum thurberianum (= Stipa thurberiana), Achnatherum hymenoides (= Oryzopsis hymenoides), Poa secunda, and Elymus elymoides. This is the only Pinus ponderosa association with Artemisia tridentata and Hesperostipa comata found on sandy habitats.
Dynamics: No Data Available
Environmental Description: These are open, sparse woodlands on isolated sand dunes and sandy flats. The only two known occurrences are from the northern Great Basin, one in Oregon and one in California. They represent isolated Pinus ponderosa forests in sagebrush habitats, which are apparently Pleistocene relicts from a more mesic environment.
Geographic Range: There are only two known occurrences, from the northern Great Basin, one in Oregon and one in California.
Nations: US
States/Provinces: CA, OR
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.686747
Confidence Level: Low - Poorly Documented
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.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 | CEGL000179 Ponderosa Pine / Wyoming Big Sagebrush / Needle-and-Thread Woodland | CEGL000179 | 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: No Data Available
- Berry, D. W. 1963. An ecological study of a disjunct Ponderosa pine forest in the northern Great Basin in Oregon. Ph.D. dissertation, Oregon State University, Corvallis. 291 pp.
- 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.
- Moir, W. H., J. F. Franklin, and C. Maser. 1973a. Lost Forest Research Natural Area. Supplement #3 to: Federal Research Natural Areas in Oregon and Washington: A guide book for scientists and educators by J. F. Franklin, F. C. Hall, C. T. Dyrness and C. Maser. USDA Forest Service, Pacific Northwest Forest and Range Experiment Station, Portland, OR.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.