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CEGL005396 Pinus monophylla - Juniperus osteosperma / Bouteloua gracilis Open Woodland

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Singleleaf Pinyon - Utah Juniper / Blue Grama Open Woodland

Colloquial Name: No Data Available

Hierarchy Level:  Association

Type Concept: This pinyon-juniper woodland association is currently described from Grand Canyon-Parashant National Monument in Arizona. More survey and classification work are needed to fully characterize this type. It typically occurs at 1875 to 1925 m (6150-6300 feet) elevation on gently sloping (1-7°) high-level plateaus and sideslopes, and occurs across all aspects. Soils are moderately- to well-drained silty clays derived from basalt parent material. This association typically supports an open tree canopy consisting of Juniperus osteosperma and Pinus monophylla. In half of the stands, there is a notable subcanopy comprised also of Pinus monophylla and Juniperus osteosperma. Beneath the tree canopy is an extremely sparse short-shrub layer of Ceanothus greggii and Artemisia tridentata. Dwarf-shrubs such as Gutierrezia sarothrae and Opuntia sp. often occur at trace covers. Bouteloua gracilis dominates a well-developed graminoid component, while Poa fendleriana, Elymus elymoides, and Aristida purpurea are frequent at lower covers. Common forbs include Penstemon linarioides, Eriogonum umbellatum, and Hymenoxys richardsonii.

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 association is currently known from Grand Canyon National Park and Grand Canyon-Parashant National Monument in Arizona. More survey work is needed to fully document its global range.

Nations: US

States/Provinces:  AZ




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 monophylla - Juniperus osteosperma / Bouteloua gracilis Woodland (Reid and Hall 2010)

Concept Author(s): M. Reid and M. Hall (2010)

Author of Description: S. Fugate

Acknowledgements: No Data Available

Version Date: 07-30-10

  • Kearsley, M. J. C., K. Green, M. Tukman, M. Reid, M. Hall, T. J. Ayers, and K. Christie. 2015. Grand Canyon National Park-Grand Canyon / Parashant National Monument vegetation classification and mapping project. Natural Resource Report NPS/GRCA/NRR--2015/913. National Park Service, Fort Collins, CO. 75 pp. plus appendices.
  • Reid, M. S., and M. E. Hall. 2010. Vegetation classification of Grand Canyon National Park. Draft report submitted to National Park Service, Fort Collins, CO.
  • Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.