Print Report

CEGL005479 Artemisia tripartita ssp. tripartita / Achnatherum thurberianum Shrubland

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Threetip Sagebrush / Thurber''s Needlegrass Shrubland

Colloquial Name: No Data Available

Hierarchy Level:  Association

Type Concept: Shrubs are usually dominant in this vegetation type, but herbaceous species cover is often substantial. Artemisia tripartita ssp. tripartita typically forms a canopy ranging from open to nearly touching crowns. Artemisia tridentata ssp. wyomingensis, Purshia tridentata, and Tetradymia canescens occur occasionally but with only a fraction of the cover of Artemisia tripartita ssp. tripartita. Chrysothamnus viscidiflorus is present with high constancy and variable cover. The herbaceous stratum is dominated by graminoids with moderate cover. Achnatherum thurberianum is usually the most abundant graminoid, but Elymus elymoides, Pascopyrum smithii, Poa secunda, and Pseudoroegneria spicata occur with some regularity and often with moderate cover. The introduced annual grass Bromus tectorum occurs at low to moderate cover in the herbaceous stratum. Forbs form an important and highly variable component of this vegetation type. The most constant forb species include Lomatium spp. and Phlox longifolia. This association occurs on flat to steeply sloping upland sites. Sites with little slope tend to have deeper soils while those with steeper slopes have shallow to moderately deep soils. Soil texture is loam, sandy loam, or clay loam, but is highly variable.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: This plant community description is based on data from Craters of the Moon (Bell et al. 2009) and on related plant communities that have been previously described. The description provided herein may vary slightly from similar plant communities found elsewhere due to the local scale at which data were collected. Additional global information will be added as it becomes 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: ~Artemisia tridentata ssp. wyomingensis Mesic Steppe & Shrubland Alliance (A3182)$$ occurs from eastern Washington and British Columbia, across the upper Columbia Basin to dry habitats of the Rocky Mountains of Montana, Wyoming, and Colorado. This shrubland association is likely found wherever environmental conditions are appropriate throughout the entire range of the alliance.

Nations: US

States/Provinces:  ID




Confidence Level: Low - Poorly Documented

Confidence Level Comments: No Data Available

Grank: GNR

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: = Threetip Sagebrush / Thurber''s Needlegrass Shrubland (Artemisia tripartita ssp. tripartita / Achnatherum thurberianum Shrubland) (Bell et al. 2009)

Concept Author(s): Bell et al. (2009)

Author of Description: Bell et al. (2009)

Acknowledgements: No Data Available

Version Date: 04-04-17

  • 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.
  • Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.