Print Report

CEGL002369 Pinus edulis - Juniperus osteosperma / Ephedra torreyana - Artemisia bigelovii Woodland

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Two-needle Pinyon - Utah Juniper / Torrey''s Joint-fir - Bigelow''s Sagebrush Woodland

Colloquial Name: No Data Available

Hierarchy Level:  Association

Type Concept: This open woodland association currently is documented only from Capitol Reef National Park in southeastern Utah, where it is common and widespread; this summary is derived from plots sampled in the park in 1986, 1988 and 2003. Stands occur on low ridges, hills, and benches with gentle slopes (not exceeding 15%) between 1677 and 1982 m (5500-6500 feet) elevation. Aspect is not important in determining the distribution of this association. The unvegetated surface is mostly covered by gravel and rocks; this fact is diagnostic of the community along with the species composition. Most stands occur in areas where lenses of sandstone are interbedded among thin layers of shale, as occurs in the Chinle, Morrison, Moenkopi and Carmel formations. Soils are shallow, rapidly drained silt loams, sandy clays, and sandy loams. Total vegetation cover ranges from 4 to 70%. The vegetation is characterized by an open canopy, typically 1-5 m tall, of Pinus edulis and Juniperus osteosperma trees that range in cover from 1 to 30%, and a diverse shrub understory that includes Artemisia bigelovii and Ephedra torreyana as dominants or codominants. Other shrubs present include Fraxinus anomala, Atriplex confertifolia, Chrysothamnus viscidiflorus, Ephedra viridis, Eriogonum corymbosum, Gutierrezia sarothrae, Opuntia polyacantha, and Shepherdia rotundifolia. The herbaceous layer is moderate in species diversity but typically provides little cover. Common graminoids include Achnatherum hymenoides, Bouteloua gracilis, Elymus elymoides, Hesperostipa comata, and Pleuraphis jamesii. Forbs may include Lepidium montanum, Phacelia crenulata, Sphaeralcea coccinea, and Thelesperma subnudum.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: This association has only been described from Capitol Reef National Park. Until further inventory is completed, there is no global information.

Similar NVC Types: No Data Available
note: No Data Available

Physiognomy and Structure: No Data Available

Floristics: This association has only been described from Capitol Reef National Park. Until further inventory is completed, there is no global information.

Dynamics:  This association has only been described from Capitol Reef National Park. Until further inventory is completed, there is no global information.

Environmental Description:  This association has only been described from Capitol Reef National Park. Until further inventory is completed, there is no global information.

Geographic Range: No Data Available

Nations: US

States/Provinces:  UT




Confidence Level: Low

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: = Pinus edulis - Juniperus osteosperma / Ephedra torreyana - Artemisia bigelovii Woodland (Clark et al. 2009)

Concept Author(s): Clark et al. (2009)

Author of Description: J. Coles

Acknowledgements: No Data Available

Version Date: 11-02-05

  • Clark, D., M. Dela Cruz, T. Clark, J. Coles, S. Topp, A. Evenden, A. Wight, G. Wakefield, and J. Von Loh. 2009. Vegetation classification and mapping project report, Capitol Reef National Park. Natural Resource Report NPS/NCPN/NRTR--2009/187. National Park Service, Fort Collins, CO. 882 pp.
  • Romme, W. H., K. D. Heil, J. M. Porter, and R. Fleming. 1993. Plant communities of Capitol Reef National Park, Utah. USDI National Park Service, Technical Report NPS/NAUCARE/NRTER-93/02. Cooperative Park Studies Unit, Northern Arizona University. 37 pp.
  • Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.