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Phragmites australis - (Sagittaria platyphylla, Vigna luteola) Tidal Herbaceous Vegetation | Southeastern Ecology Working Gro...
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Name: Phragmites australis - (Sagittaria platyphylla, Vigna luteola) Tidal Herbaceous Vegetation Reference: Southeastern Ecology Working Gro... Description: This community is broadly defined to encompass several expressions that may eventually warrant separation into distinct types. In the extreme lower Mississippi River delta, it is a common 'fresh' marsh type subject to regular influence of saltwater. It also covers a relatively uncommon brackish marsh vegetation of the middle and upper coast of Texas. Currently, no occurrences are known from the Chenier Plain of Louisiana. The type is strongly dominated by <i>Phragmites australis</i>, and in Louisiana, <i>Colocasia esculenta</i>, an invasive exotic, usually also has a strong presence. Species richness in this marsh type is very low. Other species present may include <i>Sagittaria platyphylla, Spartina alterniflora, Schoenoplectus americanus (= Scirpus americanus), Vigna luteola, Typha</i> spp., and others. In the upper Texas coast, this community is typically in brackish situations, forming small patches within the marsh. In the middle Texas coast, this community forms even smaller patches fringing mainland bayshores. <br><br>The naturalness of <i>Phragmites australis</i> ('roseau cane') has been the subject of some debate, but it appears that it may be native in Louisiana and Texas. Accounts of the earliest settlers in Louisiana contain references to 'reed marshes' in coastal regions. In addition, <i>Phragmites australis</i> rhizomes exceeding 3000 years in age have been noted in salt marsh sediments of Connecticut, and it is thus reasonable to expect that it is a native component of salt marshes in other areas of North America. Although invasive and natural communities of <i>Phragmites australis</i> are difficult to differentiate, this can be accomplished by considering the degree of disturbance at a site and observing a given stand over time to determine the degree of invasiveness. Evidence suggests that a new, more invasive genotype of <i>Phragmites australis</i> was introduced to the U.S. from the Old World and that along the Gulf Coast of Louisiana and Texas, the genotype found in invasive communities differs from the genotype found in natural, stable communities.  Accession Code: VB.CC.35691.CEGL007891 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Nov-2014 to: 01-May-2019
	status: accepted This Community's Level: association This Community's Children: [none]		Names:   Common: Texas Coast Oligohaline Roseau Cane - Arrowhead Marsh   Translated: Common Reed - (Delta Arrowhead, Hairy-pod Cowpea) Tidal Herbaceous Vegetation   Scientific: Phragmites australis - (Sagittaria platyphylla, Vigna luteola) Tidal Herbaceous Vegetation   Code: CEGL007891   UID: ELEMENT_GLOBAL.2.686089 NatureServe Explorer