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	CEGL001032 Artemisia tridentata ssp. vaseyana - Purshia tridentata / Pseudoroegneria spicata Shrubland
					Type Concept Sentence: No Data Available
				
			
								Common (Translated Scientific) Name: Mountain Big Sagebrush - Antelope Bitterbrush / Bluebunch Wheatgrass Shrubland
							
							
								Colloquial Name: No Data Available
							
							
								Hierarchy Level:  Association
							
							
								Type Concept: This description is based on occurrences at Craters of the Moon National Monument and Preserve in Idaho. Additional global information will be added as it becomes available. A combination of Artemisia tridentata ssp. vaseyana and Purshia tridentata dominate the canopy of this shrubland association. Other shrubs, such as Ericameria nauseosa and Eriogonum microthecum may also occur regularly. Shrub cover can range from 25 to 75%, and cover of the shrub stratum is greater than that of the herbaceous stratum. Pseudoroegneria spicata is typically the most abundant grass in the relatively sparse herbaceous understory. Other perennial grasses, such as Poa secunda, Elymus lanceolatus, Hesperostipa comata, and Bromus tectorum (exotic) are often present as well. Forbs occur at very low cover values and often include Eriogonum heracleoides, Crepis acuminata, Phacelia hastata, and Penstemon deustus. Soils that support this plant association can range from xeric sites with shallow soils to sites where soils are deep and well-developed. Soil texture ranges from silt loams to sandy loams.
							
							
								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: No Data Available
							
							
								Dynamics:  No Data Available
							
						
								Environmental Description:  No Data Available
							
						
								Geographic Range: This shrubland occurs in Idaho, Nevada and Wyoming.
							
							
								Nations: US
							
							
								States/Provinces:  ID, NV, WY
							
							
								Plot Analysis Summary:  
								http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.683379
							
						
								Confidence Level: Low - Poorly Documented
							
							
								Confidence Level Comments: No Data Available
							
						
								Grank: G5?
							
							
								Greasons: No Data Available
							
						| Type | Name | Database Code | Classification Code | 
|---|---|---|---|
| Class | 3 Desert & Semi-Desert Class | C03 | 3 | 
| Subclass | 3.B Cool Semi-Desert Scrub & Grassland Subclass | S11 | 3.B | 
| Formation | 3.B.1 Cool Semi-Desert Scrub & Grassland Formation | F033 | 3.B.1 | 
| Division | 3.B.1.Ne Western North American Cool Semi-Desert Scrub & Grassland Division | D040 | 3.B.1.Ne | 
| Macrogroup | 3.B.1.Ne.3 Big Sagebrush - Threetip Sagebrush - Antelope Bitterbrush Steppe & Shrubland Macrogroup | M169 | 3.B.1.Ne.3 | 
| Group | 3.B.1.Ne.3.c Spiked Big Sagebrush - Mountain Big Sagebrush - Mountain Silver Sagebrush Steppe & Shrubland Group | G304 | 3.B.1.Ne.3.c | 
| Alliance | A3208 Mountain Big Sagebrush - Mixed Steppe & Shrubland Alliance | A3208 | 3.B.1.Ne.3.c | 
| Association | CEGL001032 Mountain Big Sagebrush - Antelope Bitterbrush / Bluebunch Wheatgrass Shrubland | CEGL001032 | 3.B.1.Ne.3.c | 
								Concept Lineage: No Data Available
							
							
								Predecessors: No Data Available
							
							
								Obsolete Names: No Data Available
							
							
								Obsolete Parents: No Data Available
							
						
								Synonomy: = Artemisia tridentata ssp. vaseyana - Purshia tridentata / Pseudoroegneria spicata (Tueller and Eckert 1987)
= Mountain Big Sagebrush - Antelope Bitterbrush / Bluebunch Wheatgrass Shrubland (Artemisia tridentata ssp. vaseyana - Purshia tridentata / Pseudoroegneria spicata Shrubland) (Bell et al. 2009)
						= Mountain Big Sagebrush - Antelope Bitterbrush / Bluebunch Wheatgrass Shrubland (Artemisia tridentata ssp. vaseyana - Purshia tridentata / Pseudoroegneria spicata Shrubland) (Bell et al. 2009)
- Bell, J., D. Cogan, J. Erixson, and J. Von Loh. 2009. Vegetation inventory project report, Craters of the Moon National Monument and Preserve. Natural Resource Technical Report NPS/UCBN/NRTR-2009/277. National Park Service, Fort Collins, CO. 358 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.
 - DiPaolo, D. A., S. B. Smith, D. C. Odion, J. H. Ives, and D. A. Sarr. 2015. Vegetation classification and mapping: Lava Beds National Monument. Natural Resource Report NPS/LABE/NRR--2015/1098. National Park Service, Fort Collins, CO. 262 pp.
 - Jones, G. 1992b. Wyoming plant community classification (Draft). Wyoming Natural Diversity Database, Laramie, WY. 183 pp.
 - Peterson, E. B. 2008. International Vegetation Classification alliances and associations occurring in Nevada with proposed additions. Nevada Natural Heritage Program, Carson City, NV. 348 pp.
 - Tueller, P. T., and R. E. Eckert, Jr. 1987. Big sagebrush (Artemisia tridentata vaseyana) and longleaf snowberry (Symphoricarpos oreophilus) plant associations in northeastern Nevada. Great Basin Naturalist 47(1):117-131.
 - WNDD [Wyoming Natural Diversity Database]. No date. Unpublished data on file. Wyoming Natural Diversity Database, University of Wyoming, Laramie, WY.
 - Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.