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CEGL003320 Paspalum distichum Marsh
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Knotgrass Marsh
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: Habitat of this herbaceous vegetation of California to Washington is shallow depressions in floodplains and wet prairie. This association forms dense, nearly monotypic stands on mud or sand flats. Stands are flooded seasonally but dry out in summer, although the water table is never far below the soil surface. Most occurrences are in the Willamette Valley and on the Columbia River floodplain in the Vancouver Basin. Here, Salix lucida ssp. lasiandra, Salix fluviatilis, and Salix sitchensis may be present but with low cover. Eighteen species are recorded from the herb layer, dominated by Paspalum distichum with an average cover of 57% and ranging from 40-70%. Other species with significant cover include Equisetum arvense, Eleocharis palustris, and Phalaris arundinacea. Paspalum distichum provides good forage for waterfowl, but some managers consider it a nuisance in irrigation projects because it obstructs ditches.
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: No Data Available
Dynamics: No Data Available
Environmental Description: No Data Available
Geographic Range: This association occurs from California to Washington (Christy 2004).
Nations: US
States/Provinces: CA?, OR, WA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.689822
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G3
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.1 Arid West Interior Freshwater Marsh Macrogroup | M888 | 2.C.4.Nb.1 |
| Group | 2.C.4.Nb.1.a Clubrush species - Cattail species Interior Freshwater Marsh Group | G531 | 2.C.4.Nb.1.a |
| Alliance | A3894 Knotgrass Marsh Alliance | A3894 | 2.C.4.Nb.1.a |
| Association | CEGL003320 Knotgrass Marsh | CEGL003320 | 2.C.4.Nb.1.a |
Concept Lineage: Upgraded to Standard during screening.
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Paspalum distichum (McCain and Christy 2005) [3 plots]
= Paspalum distichum Association (Christy 2004)
= Paspalum distichum community type (Kunze 1994) [(p. 47)]
= Knotgrass Herbaceous Vegetation (Paspalum distichum) (Christy et al. 1998) [(p.114)]
= Paspalum distichum Association (Christy 2004)
= Paspalum distichum community type (Kunze 1994) [(p. 47)]
= Knotgrass Herbaceous Vegetation (Paspalum distichum) (Christy et al. 1998) [(p.114)]
- Christy, J. A. 2004. Native freshwater wetland plant associations of northwestern Oregon. Oregon Natural Heritage Information Center, Oregon State University, Portland, OR.
- Christy, J. A., J. S. Kagan, and A. M. Wiedemann. 1998. Plant associations of the Oregon Dunes National Recreation Area - Siuslaw National Forest, Oregon. Technical Paper R6-NR-ECOL-TP-09-98. USDA Forest Service, Pacific Northwest Region, Portland, OR. 196 pp.
- Christy, J. A., and J. A. Putera. 1993. Lower Columbia River Natural Area Inventory, 1992. Oregon Natural Heritage Program, Portland. 75 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.
- 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.
- McCain, C., and J. A. Christy. 2005. Field guide to riparian plant communities in northwestern Oregon. Technical Paper R6-NR-ECOL-TP-01-05. USDA Forest Service, Pacific Northwest Region, Portland. 357 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.