Print Report

CEGL000481 Alnus incana / Scirpus microcarpus Wet Shrubland

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Gray Alder / Panicled Bulrush Wet Shrubland

Colloquial Name: No Data Available

Hierarchy Level:  Association

Type Concept: This association is recognized as a minor shrub-fen Alnus incana ssp. tenuifolia type that appears in the Thompson-Okanogan Plateau of Washington and in the Blue Mountains of Oregon. Washington samples are located between 845-945 m (2800-3100 feet) elevation in broad, low-gradient valleys along meandering streams or in shrub wetlands. Oregon stands are found at higher elevations located between 1220 and 1586 m (4000-5200 feet). These sites can occur where lots of deposition occurs on floodplains under alder or where sands and gravels have been dumped into an Alnus incana wetland. Soils are typically organic with a shallow water table and often with some exposed surface water. This association has the highest average cover of Alnus incana ssp. tenuifolia in 16 Alnus incana ssp. tenuifolia types on the national forests of eastern Washington. Cornus sericea and Salix bebbiana are frequent shrubs that occur with very low cover in this community. The herbaceous layer contains wet-site graminoids and forbs and is dominated by Scirpus microcarpus (well over 20% cover). Common herbaceous species, whose combined cover is typically much less than Scirpus microcarpus, include Glyceria striata, Carex utriculata, Equisetum arvense, Epilobium ciliatum ssp. watsonii, and Veronica americana.

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: This association has the highest average cover of Alnus incana ssp. tenuifolia in 16 Alnus incana ssp. tenuifolia types on the national forests of eastern Washington. Cornus sericea and Salix bebbiana are frequent shrubs that occur with very low cover in this community. The herbaceous layer contains wet-site graminoids and forbs and is dominated by Scirpus microcarpus (well over 20% cover). Common herbaceous species, whose combined cover is typically much less than Scirpus microcarpus, include Glyceria striata (= Glyceria elata), Carex utriculata, Equisetum arvense, Epilobium ciliatum ssp. watsonii, and Veronica americana.

Dynamics:  No Data Available

Environmental Description:  This association appears in the Thompson-Okanogan Plateau of Washington and in the Blue Mountains of Oregon. Washington samples are located between 845-945 m (2800-3100 feet) elevation in broad, low-gradient valleys along meandering streams or in shrub wetlands. Oregon stands are found at higher elevations located between 1220 and 1586 m (4000-5200 feet). These sites can occur where lots of deposition occurs on floodplains under alder or where sands and gravels have been dumped into an Alnus incana wetland. Soils are typically organic with a shallow water table and often with some exposed surface water.

Geographic Range: This association is found in the Thompson-Okanogan Plateau of northeastern Washington and in the Blue Mountains of Oregon.

Nations: US

States/Provinces:  OR, WA




Confidence Level: Low

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: = Alnus incana / Scirpus microcarpus (Crowe and Clausnitzer 1997)
= Alnus incana / Scirpus microcarpus Association (Crowe et al. 2004)

Concept Author(s): R.C. Crawford

Author of Description: R.C. Crawford

Acknowledgements: No Data Available

Version Date: 10-17-02

  • 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.
  • Crowe, E., B. Kovalchik, M. J. Kerr, J. Titus, and J. S. Kagan. 2002. Riparian and wetland plant communities of eastern Oregon. Draft report. Oregon Natural Heritage Information Center, 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. 2001. Classification and management of aquatic, riparian and wetland sites on the national forests of eastern Washington. Part 1: The series descriptions. 429 pp. plus appendix. [http://www.reo.gov/col/wetland_classification/wetland_classification.pdf]
  • Kovalchik, Bud L. Personal communication. U.S. Forest Service riparian ecologist, retired. Colville, WA.
  • Murphy, C. Personal communication. Idaho Conservation Data Center, Boise.
  • 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.