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CEGL001650 Achnatherum hymenoides - Psoralidium lanceolatum Grassland

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Indian Ricegrass - Lemon Scurfpea Grassland

Colloquial Name: Indian Ricegrass - Lemon Scurfpea Mixedgrass Prairie

Hierarchy Level:  Association

Type Concept: This herbaceous association ranges from Colorado and Utah north to Idaho and Montana and may also extend into Saskatchewan, Canada. This description is based on information from Great Sand Dunes National Park and Preserve in Colorado, and the following description is based on occurrences there. It is also reported from Idaho, Montana, Utah, Wyoming and possibly Saskatchewan. Additional global information will be added as it becomes available. This association occurs on dunefields and sandsheets at 2320 to 2355 m elevation. Stands are generally flat to slightly rolling. Soils are rapidly drained sands, and ground cover is dominated by bare soil. The majority of stands are located near stabilized dunefields. This is a sparsely vegetated (<30% total cover) community of active or stabilized dunes. Achnatherum hymenoides (10-30%) is dominant to codominant with Psoralidium lanceolatum (<10%). The few other species present may include scattered Ericameria nauseosa shrubs and trace amounts of graminoids and forbs such as Hesperostipa comata, Redfieldia flexuosa, Sporobolus spp., Helianthus spp. Salsola spp., and Lygodesmia juncea.

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 herbaceous association ranges from Colorado and Utah north to Idaho and Montana and may also extend into Saskatchewan, Canada.

Nations: CA?,US

States/Provinces:  CO, ID, MT, UT, WY




Confidence Level: Low

Confidence Level Comments: No Data Available

Grank: G3Q

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: No Data Available

Concept Author(s): Western Ecology Group

Author of Description: K.E. Sabo and K. Decker

Acknowledgements: No Data Available

Version Date: 05-07-10

  • 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.
  • Bowers, J. E. 1982. The plant ecology of inland dunes in western North America. Journal of Arid Environments 5:199-220.
  • CNHP [Colorado Natural Heritage Program]. 2006-2017. Tracked natural plant communities. Colorado Natural Heritage Program, Colorado State University, Fort Collins. [https://cnhp.colostate.edu/ourdata/trackinglist/plant_communities/]
  • Castle, E. S. 1954. The vegetation and its relationship to the dune soils of Kane County, Utah. Unpublished thesis, Brigham Young University, Provo, UT.
  • MTNHP [Montana Natural Heritage Program]. 2002b. List of ecological communities for Montana. Montana Natural Heritage Program, Montana State Library, Helena, MT.
  • Marr, J. W., D. M. Armstrong, H. Chronic, J. Chronic, R. W. Pennak, W. A. Weber, R. E. Marr, D. Steward, and J. C. Meyer. 1980. Natural landmarks of the southern Rocky Mountain region. Unpublished report prepared for USDI Heritage Conservation and Recreation Service, Denver, CO, by Thorne Ecological Institute, Boulder, CO. 736 pp.
  • Pammel, L. H. 1924. Ecological notes in the Arapahoe Mountains near Fraser, Colorado. Proceedings of the Iowa Academy of Science 31:133 (Abstract).
  • Ramaley, F. 1937. Sand-hill vegetation in northwest-central Colorado. Journal of the Colorado-Wyoming Academy of Science 2(2):32-33.
  • Ramaley, F. 1939b. Sand-hill vegetation of northeastern Colorado. Ecological Monographs 9:1-51.
  • Ramaley, F. 1942. Vegetation of the San Luis Valley in southern Colorado. University of Colorado Studies, Series D, 1:231-277.
  • Salas, D. E., J. Stevens, K. Schulz, M. Artmann, B. Friesen, S. Blauer, E. W. Schweiger, and A. Valdez. 2010b. Vegetation classification and mapping project report: Great Sand Dunes National Park and Preserve. Natural Resource Report NPS/ROMN/NRR--2010/179. National Park Service, Fort Collins, CO.
  • Tendick, A., J. Spence, M. Reid, K. Shulz, G. Kittel, K. Green, A. Wight, and G. Wakefield. 2017. Vegetation classification and mapping project report, Glen Canyon National Recreation Area and Rainbow Bridge National Monument. Natural Resource Report NPS/NCPN/NRR—2017/1500. National Park Service, Fort Collins, CO. 1464 pp.
  • 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.