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(Populus tremuloides) / Crataegus douglasii / Symphoricarpos albus Wet Shrubland
Translated Name: (Quaking Aspen) / Black Hawthorn / Common Snowberry Wet Shrubland
Unique Identifier: CEGL001096
Classification Approach: International Vegetation Classification (IVC)
Summary: This plant association is found in the Columbia Basin primarily within the Palouse grassland zone. Stands are present on slopes of all aspects. A nearly complete cover of woody species characterizes stands. Crataegus douglasii forms dense thickets over shrub understories dominated by Symphoricarpos albus, Rosa woodsii, Rosa nutkana, and Spiraea betulifolia. A number of herbaceous species may be present including Achillea millefolium, Besseya rubra, Galium boreale, Geranium viscosissimum, Iris missouriensis, Lithophragma parviflorum, Potentilla arguta, and Potentilla gracilis. A few locations have a somewhat short-lived tree layer of Populus tremuloides.



Classification

Classification Confidence: Low
Classification Comments: This association is defined as a PNV vegetation type. This plant association was described as a habitat type by Daubenmire (1970).

Vegetation Hierarchy
Class 2 - Shrub & Herb Vegetation
Subclass 2.C - Shrub & Herb Wetland
Formation 2.C.4 - Temperate to Polar Freshwater Marsh, Wet Meadow & Shrubland
Division 2.C.4.Nb - Western North American Temperate & Boreal Freshwater Marsh, Wet Meadow & Shrubland
Macrogroup Western North American Montane Marsh, Wet Meadow & Shrubland
Group Western Montane-Subalpine Riparian & Seep Shrubland
Alliance Valley Bottom Black Hawthorn / Common Snowberry Wet Shrubland

This is the revised vegetation hierarchy. For more information see Classification Sources and usnvc.org.

Similar Associations
Unique Identifier Name
CEGL001093 Crataegus douglasii - (Crataegus chrysocarpa) Shrubland



Related Concepts from Other Classifications

Related Subnational Community Units
These data are subject to substantial ongoing revision and may be out of date for some states.
In the U.S., contact the state Heritage Program for the most complete and up-to-date information at: http://www.natureserve.org/natureserve-network.
Information from programs in other jurisdictions will be posted when they are made available.
Subnation Concept Name Relationship to Standard Confidence Reference
Idaho Populus tremuloides / Crataegus douglasii / Symphoricarpos albus Woodland Equivalent Certain IDCDC unpubl. data
Oregon Crataegus douglasii - Symphoricarpos albus / Festuca idahoensis Equivalent Certain Kagan et al. 2004


Other Related Concepts
Related Concept Name: Crataegus douglasii - Symphoricarpos albus Association
Relationship: = - Equivalent
Reference: 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]
Related Concept Name: Crataegus douglasii / Symphoricarpos albus - Populus tremuloides Phase
Relationship: = - Equivalent
Reference: Daubenmire, R. F. 1970. Steppe vegetation of Washington. Washington State University Agricultural Experiment Station Technical Bulletin No. 62. 131 pp.
Related Concept Name: Crataegus douglasii / Symphoricarpos albus Association
Relationship: = - Equivalent
Reference: Daubenmire, R. F. 1970. Steppe vegetation of Washington. Washington State University Agricultural Experiment Station Technical Bulletin No. 62. 131 pp.
Related Concept Name: Crataegus douglasii / Symphoricarpos albus plant association
Relationship: = - Equivalent
Reference: Crawford, R. C. 2003. Riparian vegetation classification of the Columbia Basin, Washington. Natural Heritage Report 2003-03. Washington Natural Heritage Program, Washington Department of Natural Resources, Olympia. 98 pp. plus appendices.
Related Concept Name: Crataegus douglasii
Relationship: = - Equivalent
Reference: 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.

Ecological Systems Placement

Ecological Systems Placement
Ecological System Unique ID Ecological System Name
CES304.768 Columbia Basin Foothill Riparian Woodland and Shrubland


NatureServe Conservation Status
Global Status: G3 (27Apr2000)
Rounded Global Status: G3 - Vulnerable
Reasons: This shrubland is endemic to the Columbia Basin region of eastern Washington and Oregon and western Idaho. It occurs in small stands that are confined to lower slopes. Deep soils and good soil moisture have resulted in many stands being eliminated for pasturage and grain cropping. Stands of Crataegus douglasii have had shrubs removed via herbicide application, fire, or livestock grazing. In stands where the overstory cover is reduced or eliminated Poa pratensis (often with Poa compressa) can increase in cover and will create swards with other weedy species such as Cirsium vulgare, Dipsacus fullonum, Tanacetum vulgare, and Taraxacum. In disturbed stands where the Crataegus douglasii overstory persists Arctium minus is often abundant.

Distribution
Color legend for Distribution Map
United States Distribution: CApotentially occurs, ID, OR, WA
Global Distribution: United States
Global Range: This plant association is found in the Columbia Basin primarily within the Palouse grassland zone, including eastern Oregon, eastern Washington and western Idaho.

U.S. Forest Service Ecoregions
Domain Name: Dry Domain
Division Name: Temperate Steppe Division
Province Name: Great Plains-Palouse Dry Steppe Province
Province Code: 331 Occurrence Status: Confident or certain
Section Name: Palouse Prairie Section
Section Code: 331A Occurrence Status: Confident or certain
Division Name: Temperate Desert Division
Province Name: Intermountain Semi-Desert Province
Province Code: 342 Occurrence Status: Confident or certain
Section Name: Columbia Basin Section
Section Code: 342I Occurrence Status: Confident or certain
Division Name: Temperate Steppe Regime Mountains
Province Name: Middle Rocky Mountain Steppe - Coniferous Forest - Alpine Meadow Province
Province Code: M332 Occurrence Status: Confident or certain
Section Name: Idaho Batholith Section
Section Code: M332A Occurrence Status: Confident or certain
Section Name: Blue Mountains Section
Section Code: M332G Occurrence Status: Confident or certain


Vegetation

Vegetation Summary: A nearly complete cover of woody species characterizes stands. Crataegus douglasii forms dense thickets over shrub understories dominated by Symphoricarpos albus, Rosa woodsii, Rosa nutkana, and Spiraea betulifolia. A number of herbaceous species may be present including Achillea millefolium, Besseya rubra, Galium boreale, Geranium viscosissimum, Iris missouriensis, Lithophragma parviflorum, Potentilla arguta, and Potentilla gracilis. A few locations have a somewhat short-lived tree layer of Populus tremuloides.

Vegetation Composition (incomplete)
Species Name Rounded Global Status Growth Form Stratum Charact-
eristic
Dominant Constant
Cover Class %
Con-
stancy
%
Crataegus douglasii G3 Broad-leaved deciduous shrub Shrub/sapling (tall & short)  
 
 
Symphoricarpos albus G3 Broad-leaved deciduous shrub Short shrub/sapling  
 
 


Environmental Setting

Wetland Indicator: Y
Environmental Summary: Stands are present on slopes of all aspects.


Dynamic Processes


Plot Sampling & Classification Analysis

Plots stored in VegBank


Authors/Contributors
Concept Author(s): M. Jankovsky-Jones
Element Description Edition Date: 26Nov1997
Element Description Author(s): M. Jankovsky-Jones
NatureServe Conservation Status Factors Edition Date: 23Nov1998
NatureServe Conservation Status Factors Author(s): M. Jankovsky-Jones

Ecological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).


References
  • 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.

  • Crawford, R. C. 2003. Riparian vegetation classification of the Columbia Basin, Washington. Natural Heritage Report 2003-03. Washington Natural Heritage Program, Washington Department of Natural Resources, Olympia. 98 pp. plus appendices.

  • 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.

  • Daubenmire, R. F. 1970. Steppe vegetation of Washington. Washington State University Agricultural Experiment Station Technical Bulletin No. 62. 131 pp.

  • 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.

  • 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.


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Data last updated: March 2019