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Panicum virgatum Seasonally Flooded Herbaceous Alliance | Eastern Ecology Working Group of...
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Name: Panicum virgatum Seasonally Flooded Herbaceous Alliance Reference: Eastern Ecology Working Group of... Description: This alliance encompasses seasonally flooded areas dominated by Panicum virgatum. Most examples are maritime-related, including interdunal depressions, but associations are also described from areas in Arkansas and other interior states where streams cross prairies and natural depressions in prairies. Associated species in the maritime examples include Spartina patens, Juncus canadensis, Solidago sempervirens, Festuca rubra, Eleocharis palustris, Toxicodendron radicans, Linum medium, Carex albolutescens, and Euthamia caroliniana (= Euthamia tenuifolia). This community is variable in its expression but is typically dominated by 40-85% cover of Panicum virgatum and occurs in larger interdunal depressions (up to 0.5 hectare). Variability occurs in the cover of Panicum virgatum and the richness of associated species. In some Coastal Plain cases, Morella cerifera (= Myrica cerifera) or Baccharis halimifolia will constitute less than 10% shrub cover. The vegetation is similar in total floristic composition to Morella-dominated shrublands, but shrubs are generally lacking or at very low cover and grasses are much more abundant. In most cases, shrub coverage is much less or none and other herbs codominate. When Panicum virgatum is not as dense, it is most often associated with Schoenoplectus pungens (= Scirpus pungens), Spartina patens, or a mixture of both. Soils are characterized by a shallow organic layer (usually a few centimeters in depth) overlying loamy sand or sand. The water table is at or close to the surface in the spring. These depressions are saturated or seasonally flooded and somewhat poorly drained. Many other associations remain to be described in this alliance, and its complete range of variation described.  Accession Code: VB.CC.18977.PANICUMVIRGATUM Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Panicum virgatum Seasonally Flooded Herbaceous Alliance   Translated: Switchgrass Seasonally Flooded Herbaceous Alliance   UID: HIGHER_CLASS_UNIT.2.126680 NatureServe Explorer   Code: A.1362