Print Report

CEGL000882 Pinus ponderosa - Quercus garryana / Carex geyeri Woodland

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Ponderosa Pine - Oregon White Oak / Geyer''s Sedge Woodland

Colloquial Name: No Data Available

Hierarchy Level:  Association

Type Concept: This is a mixed conifer - deciduous broad-leaved woodland association confined to the eastern Cascades foothills near the Columbia River gorge. These sites are generally found along lower treeline on slopes or ridgetops between 520 and 945 m (1700-3100 feet) elevation. The existing vegetation is characterized by a tall Pinus ponderosa layer over a shorter Quercus garryana layer. The tree canopy is mostly open and only rarely approaches being a closed stand. Quercus garryana may form clones that are ''closed patches'' within a stand. Quercus garryana may dominate a shrub layer which usually has few shrub species. The herbaceous layer is patchy and dominated by graminoids, primarily Carex geyeri with Festuca idahoensis or Bromus tectorum.

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: The existing vegetation is characterized by a tall Pinus ponderosa layer over a shorter Quercus garryana layer. The tree canopy is mostly open and only rarely approaches being a closed stand. Quercus garryana may form clones that are ''closed patches'' within a stand. Quercus garryana may dominate a shrub layer which usually has few shrub species. The herbaceous layer is patchy and dominated by graminoids, primarily Carex geyeri with Festuca idahoensis or Bromus tectorum.

Dynamics:  No Data Available

Environmental Description:  Sites are generally found along lower treeline on slopes or ridgetops between 520 and 945 m (1700-3100 feet) elevation.

Geographic Range: This community has a narrow range in the eastern Cascade foothills of Washington and perhaps adjacent Oregon. It appears to be restricted to two counties.

Nations: US

States/Provinces:  WA




Confidence Level: Low - Poorly Documented

Confidence Level Comments: No Data Available

Grank: G2G3

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 ponderosa - Quercus garryana / Carex geyeri Woodland (John and Tart 1986)

Concept Author(s): R.C. Crawford

Author of Description: R.C. Crawford

Acknowledgements: No Data Available

Version Date: 11-26-97

  • 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.
  • John, T., and D. Tart. 1986. Forested plant associations of the Yakima Drainage within the Yakama Indian Reservation. Review copy prepared for the Yakama Indian Nation - BIA-SCS.
  • WNHP [Washington Natural Heritage Program]. 2018. Unpublished data files. Washington Natural Heritage Program, Department of Natural Resources, Olympia, WA.
  • Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.