Invalid Unit Specified
CEGL004110 Fimbristylis castanea - Paspalum distichum Marsh

The U.S. National
Vegetation Classification
Type Concept Sentence:
Collapse All::Expand All
Common (Translated Scientific) Name: Marsh Fimbry - Knotgrass Marsh
Colloquial Name: Florida Panhandle Dune Swale
Hierarchy Level: Association
Type Concept: This dune swale community of the Florida Panhandle Gulf Coast is dominated by Fimbristylis castanea, and/or Paspalum distichum. In some examples, Fimbristylis castanea may occur in nearly monospecific stands, or sometimes intermixed with Panicum amarum var. amarulum (= Panicum amarulum), Iva imbricata, Sesuvium portulacastrum, and Lilaeopsis carolinensis.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features:
Classification Comments: On the panhandle and southwestern Gulf coasts of Florida, it is a common colonizer of drying tide pools and brackish flats on recently built-out beaches (A. Johnson pers. obs.).
Similar NVC Types:
Fimbristylis castanea - Schoenoplectus pungens Marsh, note:
Paspalum vaginatum Marsh, note: often occurs in close association.
Physiognomy and Structure: No Data Available
Floristics: This type is dominated by halophytic species, including Fimbristylis castanea, Paspalum distichum, Panicum amarum var. amarulum (= Panicum amarulum), and/or Iva imbricata (Johnson 1997).
Dynamics: This dune swale community is maintained by periodic incursion of seawater. The dominant species apparently rapidly colonize bare sand patches. The formation of a seaward dune ridge which cuts off seawater inflow will lead to successional replacement of this type by a Eragrostis elliottii type within 4-7 years (Johnson 1997).
Environmental Description: This type occurs in early-successional brackish interdune swales and backdune flats.
Geographic Range: This dune swale community occurs in the Florida Panhandle Gulf Coast.
Nations: US
States/Provinces: FL
US Forest Service Ecoregions (1994/1995)
Domain Name:
Division Name:
Province Name: Outer Coastal Plain Mixed Forest Province
Province Code: 232    Occurrence Status: Confident or certain
Section Name: Florida Coastal Lowlands (Western) Section
Section Code: 232D     Occurrence Status: Confident or certain
Omernik Ecoregions:
Confidence Level: Low
Confidence Level Comments:
Grank: G3
Concept Lineage:
Obsolete Names:
Obsolete Parents:
Synonomy: = Paspalum / Fimbristylis Swales (Johnson 1997)
Concept Author(s): A.S. Weakley, mod. R.E. Evans
Author of Description: R.E. Evans
Version Date: 29Jul2002
  • Au, S. 1974. Vegetation and ecological processes on Shackleford Bank, North Carolina. USDI National Park Service, Scientific Monograph No. 6.
  • Johnson, A. F. 1997. Rates of vegetation succession on a coastal dune system in northwest Florida. Journal of Coastal Research 13:373-384.
  • Johnson, Ann F. Personal communication. Florida Natural Areas Inventory, Tallahassee.
  • Sauer, J. D. 1967. Geographic reconnaissance of seashore vegetation along the Mexican Gulf Coast. Louisiana State University Press, Coastal Studies Series No. 21, Baton Rouge.
  • Southeastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Durham, NC.