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CEGL001094 (Populus tremuloides) / Crataegus douglasii / Heracleum maximum Wet Shrubland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: (Quaking Aspen) / Black Hawthorn / Common Cow-parsnip Wet Shrubland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This shrubland association of the Columbia Basin grows on relatively moist sites on deep soils within flat valleys between 550 and 800 m (1800-2600 feet) elevation. Winters are cool and receive the bulk of the area''s 50 cm of annual precipitation. Summers are warm to hot with very little precipitation. The canopy is dominated by Crataegus douglasii between 5-7 m in height. Intermittently the overstory is locally dominated by Populus tremuloides. The understory is dominated by forbs, including Heracleum maximum, Hydrophyllum fendleri, and Urtica dioica. The remainder of the herbaceous layer is relatively depauperate due to the extreme shading of the Heracleum maximum.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This association is defined as a PNV vegetation type.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: This is a dense thicket of the broad-leaved deciduous shrub Crataegus douglasii of 5-7 m height. The understory is dominated by a lush layer of a combination of the tall (up to 2 m tall) perennial forbs Heracleum maximum (= Heracleum lanatum), Hydrophyllum fendleri, or Urtica dioica. The dense herbaceous layer provides so much shade that few shorter species are able to establish, unless they have a growth peak in the spring before the Heracleum develops. A few locations have a tree layer of Populus tremuloides, but apparently these do not differ in environmental characteristics. This type frequently has a floristic component characteristic of the nearby mountains, such as Circaea alpina, Cornus sericea (= Cornus stolonifera), Elymus glaucus, Geum macrophyllum, Osmorhiza berteroi, and Pteridium aquilinum. It is also very susceptible to degradation by livestock use, which results in an understory of the exotic and/or invasive annual grasses Bromus tectorum and Poa pratensis.
Dynamics: No Data Available
Environmental Description: Elevations range from 550 to 800 m (1800-2600 feet) in the semi-arid steppe region of eastern Washington. This association is typically found on aggraded valley floors (locally called "flats") which border intermittent or permanent streams with dependable soil moisture. These are valleys with accumulated glacial outwash materials of fine silts and clays. It often extends up contiguous north-facing slopes where there is seepage providing constant moisture.
Geographic Range: This is a minor type in the Columbia Basin within the Palouse grassland zone of southeastern Washington, northeastern Oregon and western Idaho. It is also known from one location in eastern Idaho.
Nations: US
States/Provinces: ID, OR, WA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.689115
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G1
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 2 Shrub & Herb Vegetation Class | C02 | 2 |
| Subclass | 2.C Shrub & Herb Wetland Subclass | S44 | 2.C |
| Formation | 2.C.4 Temperate to Polar Freshwater Marsh, Wet Meadow & Shrubland Formation | F013 | 2.C.4 |
| Division | 2.C.4.Nb Western North American Temperate Freshwater Marsh, Wet Meadow & Shrubland Division | D031 | 2.C.4.Nb |
| Macrogroup | 2.C.4.Nb.5 Sitka Alder - Booth''s Willow / Northwest Territory Sedge Montane Marsh, Wet Meadow & Shrubland Macrogroup | M893 | 2.C.4.Nb.5 |
| Group | 2.C.4.Nb.5.d Willow species - Alder species - Water Birch Riparian & Seep Shrubland Group | G527 | 2.C.4.Nb.5.d |
| Alliance | A3974 Black Hawthorn / Common Snowberry Wet Shrubland Alliance | A3974 | 2.C.4.Nb.5.d |
| Association | CEGL001094 (Quaking Aspen) / Black Hawthorn / Common Cow-parsnip Wet Shrubland | CEGL001094 | 2.C.4.Nb.5.d |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = (Populus tremuloides) - Crataegus douglasii / Heracelum maximum plant association (Crawford 2003) [2 plots]
> Crataegus douglasii / Heracleum lanatum - Populus tremuloides Phase (Daubenmire 1970) [(p.125)]
> Crataegus douglasii / Heracleum lanatum Association (Daubenmire 1970) [(p.56)]
> Crataegus douglasii / Heracleum lanatum - Populus tremuloides Phase (Daubenmire 1970) [(p.125)]
> Crataegus douglasii / Heracleum lanatum Association (Daubenmire 1970) [(p.56)]
- 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.
- 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.