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CEGL003400 Alnus rubra / Oxalis (oregana, trilliifolia) Riparian Forest
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Red Alder / (Redwood Sorrel, Threeleaf Woodsorrel) Riparian Forest
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This association occurs in the southern Cascade foothills of Washington, including Mount Rainier and on the Olympic Peninsula, on relatively well-drained soils at lower elevations on riparian terraces, streambanks or floodplains. The canopy is dominated by Alnus rubra. Picea sitchensis or Tsuga heterophylla are frequently in the overstory but with low cover. When present, the tall-shrub layer is dominated by Acer circinatum. Rubus spectabilis or Ribes bracteosum may be present but under 20% cover in aggregate. The understory is dominated by Oxalis oregana or Oxalis trilliifolia. Polystichum munitum can be codominant or dominant in the herb layer. Many other forbs and ferns, including Athyrium filix-femina, Luzula fastigiata, Luzula parviflora, Tiarella trifoliata, Circaea alpina, and Tolmiea menziesii, are frequently present to prominent. Grasses, such as Elymus glaucus and Elymus hirsutus, are present to codominant but never dominant or more abundant in aggregate than Oxalis spp.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This association concept has been expanded to include subassociations with a Acer circinatum-dominated shrub layer.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: No Data Available
Dynamics: No Data Available
Environmental Description: No Data Available
Geographic Range: No Data Available
Nations: US
States/Provinces: OR, WA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.688876
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G4
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 | CEGL003400 Red Alder / (Redwood Sorrel, Threeleaf Woodsorrel) Riparian Forest | CEGL003400 | 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 rubra / Oxalis spp. association (Diaz and Mellen 1996)
= Alnus rubra/Oxalis (oregana, trilliifolia) Forest (Crawford et al. 2009)
= Alnus rubra/Oxalis (oregana, trilliifolia) Forest (Crawford et al. 2009)
- Crawford, R. C., C. B. Chappell, C. C. Thompson, and F. J. Rocchio. 2009. Vegetation classification of Mount Rainier, North Cascades, and Olympic national parks. Plant association descriptions and identification keys: Appendices A-G. Natural Resource Technical Report NPS/NCCN/NRTR--2009/D-586. National Park Service, Fort Collins, CO. 586 pp.
- Diaz, N. M., and T. K. Mellen. 1996. Riparian ecological types, Gifford Pinchot and Mt. Hood national forests, and Columbia River Gorge National Scenic Area. Technical Report R6-NR-TP-10-96. USDA Forest Service, Pacific Northwest Region, Portland, OR. 203 pp. plus appendices.
- 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.