Vegetation Classification and Mapping Project Report - USGS
Vegetation Classification and Mapping Project Report - USGS
Vegetation Classification and Mapping Project Report - USGS
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<strong>USGS</strong>-NPS <strong>Vegetation</strong> <strong>Mapping</strong> Program<br />
Colonial National Historical Park<br />
cattail) <strong>and</strong> Spartina cynosuroides (big cordgrass) may form extensive dominance patches. All of<br />
these species are able to tolerate a broad range of halinity, <strong>and</strong> the high mean species richness of<br />
this type suggests that it is generally restricted to only slightly oligohaline habitats. Infrequently<br />
present are several species that are more specific to oligohaline conditions, including<br />
Echinochloa walteri (coast cockspur grass), Kosteletzkya virginica (Virginia saltmarsh mallow),<br />
Pluchea odorata (sweetscent), Rumex verticillatus (swamp dock), Sagittaria lancifolia<br />
(bulltongue arrowhead), <strong>and</strong> Teucrium canadense (Canada germ<strong>and</strong>er). Spartina cynosuroides<br />
(big cordgrass) occurs in approximately two-thirds of the representative vegetation sample plots<br />
<strong>and</strong> at times codominates. The colonial sedge Carex stricta (upright sedge) often forms local<br />
dominance patches, characteristically on hummocks raised 20-25 cm above the primary marsh<br />
surface. Such st<strong>and</strong>s also characteristically contain scattered individuals of Rosa palustris<br />
(swamp rose) or Cephalanthus occidentalis (common buttonbush).<br />
Most Abundant Species: Information not available.<br />
Characteristic Species: Hibiscus moscheutos ssp. moscheutos (crimsoneyed rosemallow),<br />
Leersia oryzoides (rice cutgrass), Mikania sc<strong>and</strong>ens (climbing hempvine), Pelt<strong>and</strong>ra virginica<br />
(green arrow arum), Polygonum arifolium (halberdleaf tearthumb), Polygonum punctatum<br />
(dotted smartweed), Polygonum sagittatum (arrowleaf tearthumb), Spartina cynosuroides (big<br />
cordgrass), Toxicodendron radicans (eastern poison ivy).<br />
Other Noteworthy Species: Information not available.<br />
USFWS Wetl<strong>and</strong> System: Estuarine.<br />
DISTRIBUTION<br />
Range: This association is currently described from Virginia, Maryl<strong>and</strong>, <strong>and</strong> New Jersey.<br />
States/Provinces: MD, NJ, VA.<br />
Federal L<strong>and</strong>s: NPS (Colonial, George Washington Birthplace); USFWS (Chesapeake<br />
Marshl<strong>and</strong>s).<br />
CONSERVATION STATUS<br />
Rank: GNR (12-May-2002).<br />
Reasons: Information not available.<br />
CLASSIFICATION INFORMATION<br />
Status: St<strong>and</strong>ard.<br />
Confidence: 2 - Moderate.<br />
Comments: In Virginia, occurrences are known from the Mattaponi (New <strong>and</strong> Gleason<br />
marshes), Pamunkey (Sweet Hall, Cousiac, <strong>and</strong> Cohoke marshes), <strong>and</strong> Rappahannock (Otterburn<br />
Marsh) rivers. In Maryl<strong>and</strong>, an occurrence documented from the Pocomoke River (Cypress<br />
Swamp) is currently attributed to this type. In New Jersey, an occurrence is known from<br />
Rancocas Creek.<br />
Similar Associations:<br />
• Impatiens capensis - Pelt<strong>and</strong>ra virginica - Polygonum arifolium - Schoenoplectus fluviatilis - Typha angustifolia<br />
Tidal Herbaceous <strong>Vegetation</strong> (CEGL006325).<br />
Related Concepts:<br />
• Hibiscus moscheutos - Polygonum arifolium - Leersia oryzoides - (Carex stricta) Tidal Herbaceous <strong>Vegetation</strong><br />
(Coulling 2002) ?<br />
• Hibiscus moscheutos - Polygonum punctatum - Pelt<strong>and</strong>ra virginica - (Typha angustifolia) - (Spartina<br />
cynosuroides) Herbaceous <strong>Vegetation</strong> (Coulling 2002) =<br />
• Osmunda regalis - Rosa palustris Herbaceous <strong>Vegetation</strong> (Bartgis 1986) ?<br />
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