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A3894 Paspalum distichum Marsh Alliance
Type Concept Sentence: This alliance consists of dense, nearly monotypic stands dominated by Paspalum distichum. These stands are found on mud or sand flats, moist places, marshes and ditches of low valleys of Oregon, Washington, Nevada and California.
Common (Translated Scientific) Name: Knotgrass Marsh Alliance
Colloquial Name: Knotgrass Marsh
Hierarchy Level: Alliance
Type Concept: This alliance consists of dense, nearly monotypic stands dominated by Paspalum distichum. Sites are on mud or sand flats, moist places, marshes and ditches that are flooded seasonally but dry out in summer while water tables are not far below the soil surface. Most occurrences are known from the Willamette Valley, the Columbia River floodplain and lowlands of California and Nevada.
Diagnostic Characteristics: Concentric rings of wet to drying vegetation around ponds and marshes dominated by Paspalum distichum.
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: Rhizomatous perennial graminoid growing in dense mats from 0.2 to 0.6 m (7-20 inches) tall.
Floristics: This alliance consists of dense, nearly monotypic stands dominated by Paspalum distichum.
Dynamics: No Data Available
Environmental Description: Sites are on mud or sand flats, moist places, marshes and ditches that are flooded seasonally but dry out in summer while water tables are not far below the soil surface.
Geographic Range: Most occurrences are known from the Willamette Valley of Oregon, the Columbia River floodplain of Washington, and lowlands of California and Nevada.
Nations: US
States/Provinces: CA, NV?, OR, WA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.899945
Confidence Level: Moderate
Confidence Level Comments: No Data Available
Grank: GNR
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: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: No Data Available
- Faber-Langendoen, D., J. Drake, M. Hall, G. Kittel, S. Menard, C. Nordman, M. Pyne, M. Reid, M. Russo, K. Schulz, L. Sneddon, K. Snow, and J. Teague. 2013-2019b. Screening alliances for induction into the U.S. National Vegetation Classification: Part 1 - Alliance concept review. NatureServe, Arlington, VA.