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CEGL003293 Alnus (incana, viridis ssp. sinuata) / Lysichiton americanus - Oenanthe sarmentosa Shrub Swamp
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: (Gray Alder, Sitka Alder) / Yellow Skunk-cabbage - Water Parsley Shrub Swamp
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This wetland association occurs only in a limited area of the central Puget Lowlands of Washington. It occurs along low-gradient or partially impounded stream systems or in impounded wetlands. Sites are seasonally flooded to permanently flooded with significant water-level fluctuation. Soils are composed of peat and muck. The deciduous tall-shrub canopy is dominated by either Alnus incana or Alnus viridis ssp. sinuata, apparently the latter more frequently. Other tall shrubs usually present are Salix spp. and Frangula purshiana, either of which can be locally codominant. The understory is usually codominated by Lysichiton americanus and one or more of the following graminoids: Carex utriculata, Carex aquatilis var. dives, Carex obnupta, Carex cusickii, and Calamagrostis canadensis. Oenanthe sarmentosa is almost always present. The combination of dominance of Alnus incana or Alnus viridis ssp. sinuata in the canopy with Lysichiton americanus and Oenanthe sarmentosa appears to be diagnostic.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: Includes occurrences with Alnus viridis ssp. sinuata observed by WANHP staff.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: The deciduous tall-shrub canopy is dominated by either Alnus incana or Alnus viridis ssp. sinuata, apparently the latter more frequently. Other tall shrubs usually present are Salix spp. and Frangula purshiana, either of which can be locally codominant. The understory is usually codominated by Lysichiton americanus and one or more of the following graminoids: Carex utriculata, Carex aquatilis var. dives, Carex obnupta, Carex cusickii, and Calamagrostis canadensis. Oenanthe sarmentosa is almost always present. The combination of dominance of Alnus incana or Alnus viridis ssp. sinuata in the canopy with Lysichiton americanus and Oenanthe sarmentosa appears to be diagnostic.
Dynamics: No Data Available
Environmental Description: It occurs along low-gradient or partially impounded stream systems or in impounded wetlands. Sites are seasonally flooded to permanently flooded with significant water-level fluctuation. Soils are composed of peat and muck.
Geographic Range: This wetland association occurs only in a limited area of the central Puget Lowlands of Washington.
Nations: US
States/Provinces: WA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.683875
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G1
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 1 Forest & Woodland Class | C01 | 1 |
| Subclass | 1.B Temperate & Boreal Forest & Woodland Subclass | S15 | 1.B |
| Formation | 1.B.3 Temperate Flooded & Swamp Forest Formation | F026 | 1.B.3 |
| Division | 1.B.3.Ng Vancouverian Flooded & Swamp Forest Division | D193 | 1.B.3.Ng |
| Macrogroup | 1.B.3.Ng.1 Vancouverian Flooded & Swamp Forest Macrogroup | M035 | 1.B.3.Ng.1 |
| Group | 1.B.3.Ng.1.d Sitka Spruce - Black Cottonwood - Oregon Ash Lowland Riparian Forest Group | G851 | 1.B.3.Ng.1.d |
| Alliance | A3745 Bigleaf Maple - Red Alder Riparian Forest Alliance | A3745 | 1.B.3.Ng.1.d |
| Association | CEGL003293 (Gray Alder, Sitka Alder) / Yellow Skunk-cabbage - Water Parsley Shrub Swamp | CEGL003293 | 1.B.3.Ng.1.d |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: ? Alnus incana community type (Kunze 1994)
- Kunze, L. M. 1994. Preliminary classification of native, low elevation, freshwater wetland vegetation in western Washington. Washington State Department of Natural Resources, Natural Heritage Program. 120 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.