Name:
Panicum hemitomon - Eriocaulon compressum - Rhynchospora corniculata Marsh
Reference:
NatureServe Biotics 2019
Description:
This association represents graminoid-dominated deep flatwoods ponds of the West Gulf Coastal Plain. These ponds are generally circular or elliptical, flat-bottomed depressions on flat terraces in the Outer Coastal Plain, often in ancient stream channels and sloughs. They tend to occur as inclusions within wetland pine savannas, but may also be bordered by upland depression swamps. Examples generally have a layer of tall wetland grasses and sedges above a layer of semi-aquatic herbs. Plant species dominance varies greatly depending upon water depth and the spread of colonial, rhizomatous species, and may also be related to geographic isolation of individual ponds and variations in local fire regimes. These ponds tend to lack woody plant species, but may contain scattered, stunted <i>Nyssa biflora</i> and stems of <i>Cephalanthus occidentalis</i>. The following species are characteristic of this type: <i>Eriocaulon compressum, Xyris fimbriata, Eleocharis equisetoides, Eleocharis quadrangulata</i>, as well as two additional species, <i>Carex verrucosa</i> and <i>Rhynchospora cephalantha</i>, which are more frequent in other pond types. Some other species frequently found in this type include <i>Eriocaulon compressum, Rhynchospora corniculata, Panicum hemitomon, Ludwigia sphaerocarpa, Xyris laxifolia var. iridifolia</i>, and <i>Sagittaria graminea</i>. Other herbaceous species may include <i>Gratiola brevifolia, Hydrolea ovata, Proserpinaca pectinata, Pluchea rosea, Ludwigia pilosa, Bacopa caroliniana, Xyris</i> sp., and <i>Rhynchospora capitellata</i>.
Accession Code:
urn:lsid:vegbank.org:commConcept:33363-{2B8C8BD6-2A23-42EA-86B2-D71939B8C895}
Plot-observations of this Community Concept:
2
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