Classification of Vegetation Communities of Maryland: First Iteration
A Subset of the International Classification of Ecological
V. HERBACEOUS VEGETATION
Concept: This alliance encompasses a variety of temperate wetland communities dominated by Panicum hemitomon, including various ponds, lakes, depression meadows, flatwoods ponds, pineland ponds, Carolina bays, interdune swales, etc. It is wide-ranging, occurring throughout the eastern and southeastern Coastal Plain of the United States. It is very common in Florida, where it occurs in thousands of lakes and ponds. It is also common in Louisiana.
Comments: Data exists for some South Carolina depression meadows. Formation placement is problematic; some Panicum hemitomon communities have temporarily flooded hydrology, while others are semipermanently flooded. It may be desirable to split this and recognize two or more categories. Kirkman and Sharitz (1994) report a vegetation type dominated by Panicum hemitomon in "Carolina Bays" in Allendale and Barnwell counties, South Carolina. This includes examples at the DOE Savannah River Site. It is not clear which association would accommodate these samples.
Range: This alliance is found in Alabama, Delaware, Florida, Georgia, Louisiana, Maryland, Mississippi, New Jersey, North Carolina, South Carolina, Tennessee, Texas, and possibly Virginia (?).
States/Provinces: AL DE FL GA LA MD MS NC NJ SC TN TX
TNC Ecoregions: 31:C, 40:?, 41:C, 42:C, 43:?, 44:C, 53:C, 55:C, 56:C, 57:C, 58:C, 62:C
USFS Ecoregions: 222Eb:CCC, 231Cc:C??, 231Cd:C??, 231Fb:CCC, 232A:CC, 232Ba:CCP, 232Bb:CCP, 232Bc:CCP, 232Be:CCP, 232Bf:CCC, 232Bg:CCC, 232Bh:CCP, 232Bi:CCP, 232Bj:CCC, 232Bk:CCC, 232Bl:CCP, 232Bm:CCP, 232Bn:CCP, 232Bo:CCP, 232Bq:CCC, 232Bv:CCC, 232Ca:CCC, 232Cb:CCC, 232Cc:CCC, 232Cd:CCC, 232Cf:CCP, 232Ch:CCC, 232Da:CCP, 232Db:CCP, 232Dc:CCC, 232Ea:CCC, 232Eb:CCC, 232Fa:CCC, 232Fb:CCC, 232Fd:CCC, 232Fe:CCP, 232Ga:CCP, 232Gc:CCP, 234Aa:CCC
Federal Lands: DOD (Arnold, Fort Benning, Sunny Point); DOE (Savannah River Site); USFS (Angelina, Apalachicola, Conecuh, Croatan, De Soto, Ocala, Osceola); USFWS (Eufaula, McFaddin)
Synonymy: IIE1f. Coastal Plain Small Depression Pond Complex, in part (Allard 1990); Small Depression Pond, in part (Schafale and Weakley 1990); Depression Meadow, in part (Nelson 1986); Basin Marsh, in part (FNAI 1992a); Flatwoods Pond, in part (Smith 1996a); Flatwoods Pond, in part (Smith 1996b)
References: Allard 1990, FNAI 1992a, FNAI 1992b, Kirkman and Sharitz 1994, Nelson 1986, Schafale and Weakley 1990, Smith 1996a, Smith 1996b, Wolfe 1990
Authors: D.J. ALLARD, MP, Southeast Identifier: A.1379
PANICUM HEMITOMON - PANICUM VERRUCOSUM HERBACEOUS VEGETATION
Maidencane - Warty Panicgrass Herbaceous Vegetation
Ecological Group (SCS;MCS): Southeastern Coastal Plain Open Ponds and Marshes (345-05; n/a)
Concept: This seasonally flooded, Coastal Plain wetland occurs in small topographically isolated basins on the central Atlantic Coastal Plain. This vegetation usually occurs on the relatively higher, outer margin of the basin, occurring on loamy sands. Panicum hemitomon is the dominant species, often occurring in monotypic stands. Associates that may occur at low cover include Cladium mariscoides, Dulichium arundinaceum, Panicum verrucosum, Dichanthelium spretum (= Panicum spretum), Carex striata, Juncus repens, and Eleocharis quadrangulata. Occasional seedlings of Liquidambar styraciflua, Acer rubrum, and Diospyros virginiana also may occur.
States/Provinces: DE:S?, MD:S?, NJ:S1S2
TNC Ecoregions: 58:C, 62:C
USFS Ecoregions: 232A:CC, 232B:CC
References: Berdine and Gould 1999, Bowman 2000, Breden et al. 2001
Authors: ECS Confidence: 3 Identifier: CEGL006338
- Maryland Vegetation Classification Subset Report V.A. Perennial graminoid vegetation
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