Print Report

CEGL000147 Pinus contorta / Deschampsia cespitosa Swamp Forest

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Lodgepole Pine / Tufted Hairgrass Swamp Forest

Colloquial Name: No Data Available

Hierarchy Level:  Association

Type Concept: This forest association has a rather open overstory and continuous grass layer, and many stands would better be classified as woodlands. The tree canopy is dominated by Pinus contorta, generally the only conifer, with 50% cover. Deschampsia cespitosa dominates the graminoid layer. Other common herbaceous plants are Thalictrum occidentale, Poa pratensis, and Juncus arcticus ssp. littoralis. Stands occur in the eastern Cascades of Oregon at flat sites between 1220-2290 m (4000-7500 feet) and possibly in California. The sites are typically adjacent to meadows or wetlands, or within slightly concave sites. Soils are variable, but silty loams may be most common.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: This association is based on information from only 5 plots. It has been fairly well inventoried in Oregon, but should occur elsewhere in the Intermountain West.

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

Physiognomy and Structure: No Data Available

Floristics: The tree canopy is dominated by Pinus contorta, generally the only conifer, with 50% cover. Deschampsia cespitosa (60% cover) dominates the graminoid layer. Other common herbaceous plants are Thalictrum occidentale (7% cover), Poa pratensis (30% cover), and Juncus arcticus ssp. littoralis (= Juncus balticus) (10% cover).

Dynamics:  No Data Available

Environmental Description:  No Data Available

Geographic Range: Known only from Oregon in the southern East Cascades and the southwestern Blue Mountains. This type might be found elsewhere.

Nations: US

States/Provinces:  CA?, OR




Confidence Level: Low

Confidence Level Comments: No Data Available

Grank: G3

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 contorta / Deschampsia cespitosa (Crowe and Clausnitzer 1997)
= Pinus contorta var. latifolia / Deschampsia caespitosa Association (Crowe et al. 2004)

Concept Author(s): Crowe et al. (2004)

Author of Description: M.P. Murray

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.
  • Crowe, E. A., B. L. Kovalchik, and M. J. Kerr. 2004. Riparian and wetland vegetation of central and eastern Oregon. Oregon Natural Heritage Information Center, Institute for Natural Resources, Oregon State University, Portland. 473 pp. [http://oregonstate.edu/ornhic/ publications.html]
  • Crowe, E. A., and R. R. Clausnitzer. 1997. Mid-montane wetland plant associations of the Malheur, Umatilla, and Wallowa-Whitman national forests. Technical Paper R6-NR-ECOL-TP-22-97. USDA Forest Service, Pacific Northwest Region, Portland, OR.
  • Kagan, J. S., J. A. Christy, M. P. Murray, and J. A. Titus. 2004. Classification of native vegetation of Oregon. January 2004. Oregon Natural Heritage Information Center, Portland. 52 pp.
  • Kovalchik, B. L. 1987. Riparian zone associations - Deschutes, Ochoco, Fremont, and Winema national forests. Technical Paper 279-87. USDA Forest Service, Pacific Northwest Region, Portland, OR. 171 pp.
  • Titus, J. H., M. Kerr, E. Crowe, and B. Kovalchik. 1998. Riparian zones of eastern Oregon. Oregon Natural Heritage Program, Portland.
  • Titus, J. H., and J. A. Christy. 1996a. Vegetation of Big Marsh, Deschutes National Forest, Oregon. Report to Deschutes National Forest. Oregon Natural Heritage Program, The Nature Conservancy, Portland.
  • Weixelman, D. A., D. C. Zamudio, and K. A. Zamudio. 1999. Eastern Sierra Nevada riparian field guide. USDA Forest Service, Humboldt-Toiyabe National Forest. Sparks, NV. 92 pp.
  • Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.