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Reference
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Description |
Comm #11041
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Quercus falcata - Quercus stellata - (Pinus taeda) West Gulf Coastal Plain Forest
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accession code: VB.CC.35390.CEGL008415
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Southeastern Ecology Working Gro... |
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This association includes predominately hardwood-dominated forests of the West Gulf Coastal Plain and Upper West Gulf Coastal Plain. Stands documented in eastern Texas vary somewhat in moisture status and range in composition from those strongly dominated by <i>Quercus falcata</i> in higher landscape positions to nearly equal ratios of <i>Quercus falcata</i> and other hardwood trees, and <i>Pinus taeda</i> in lower slope positions. These forests are relatively low in species diversity and have no other particularly diagnostic species. However, sites dominated by <i>Quercus falcata</i> in combination with other hardwoods are very rare in the region. As currently defined, this type accommodates a slight range of moisture conditions, and the vegetation is necessarily variable; however, all stands are characterized by <i>Quercus falcata</i> as the single most important species. |
Comm #11042
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CEGL001416
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accession code: VB.CC.4000.CEGL001416
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
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Comm #11043
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Aristida longispica - Schizachyrium scoparium - Diodia teres Saline Herbaceous Vegetation
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accession code: VB.CC.36367.CEGL008419
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Southeastern Ecology Working Gro... |
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This edaphically controlled grass-forb prairie association occurs on saline-sodic soils of alluvial origin in the northern West Gulf Coastal Plain and Mississippi River Alluvial Plain of Arkansas and Louisiana. The topsoil is thin silt with toxic levels of sodium and/or magnesium salts in the subsoil, and some areas are often exposed as "slick spots," which are denuded of vegetation. Although the subsoil is silt, it is essentially cemented into an impervious hardpan by calcium or other minerals. Sites therefore alternate between extremely dry and extremely wet, a condition that has been described as xerohydric. Genesis is uncertain, but salts may be "wicked" to the surface through evaporation. The so-called slick spots are rimmed by a "cryptogamic lip" of lichens, algae and diminutive vascular plants. <i>Geocarpon minimum</i> occurs in this zone in the West Gulf Coastal Plain. Farther back from the lip, <i>Cladonia</i> lichens, <i>Aristida longispica, Aristida</i> spp., and <i>Schizachyrium scoparium</i> sequentially become dominant, along with <i>Sabal minor</i> in the West Gulf Coastal Plain. <i>Schoenolirion wrightii</i> is a regionally rare species in this zone. The role of fire in maintaining this community is not understood; some areas may support relatively frequent fire, and others are too thinly vegetated to carry a fire. |
Comm #11044
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Quercus alba - (Quercus prinus) / (Hydrangea quercifolia) - Viburnum acerifolium / Carex picta - Piptochaetium avenaceum Forest
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accession code: VB.CC.34908.CEGL008430
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Southeastern Ecology Working Gro... |
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This association includes dry-mesic white oak forests of the southern Cumberland Plateau in Alabama and Tennessee. This forest occurs mostly over sandstone-derived soils, on middle to high slopes and ridges; also included are areas influenced by calcareous rocks or soils. Diagnostic features of this association are canopy dominance by <i>Quercus alba</i>, with an overall dry-mesic species composition, signified by the prominence of <i>Quercus prinus, Vaccinium</i> spp., <i>Oxydendrum arboreum, Cornus florida</i>, and by the absence or low coverage of mesophytic forest species (e.g., <i>Fagus grandifolia, Tilia americana var. heterophylla, Ilex opaca var. opaca, Liriodendron tulipifera, Magnolia acuminata, Euonymus americanus</i>). In the Bankhead National Forest of Alabama, where the type was initially identified, the high constancy of <i>Magnolia macrophylla, Hydrangea quercifolia</i>, and Carex picta serve to help identify this type, but these taxa are not necessarily good indicators throughout its range, Additionally, <i>Pinus taeda</i> and/or <i>Pinus virginiana</i> (especially on higher slopes) may also be present but may indicate past disturbance. The most common subcanopy species are <i>Cornus florida, Oxydendrum arboreum</i>, and <i>Magnolia macrophylla</i> (within its range). On higher slopes and ridges <i>Nyssa sylvatica</i> and <i>Carya glabra</i> become additional, important subcanopy components. In areas with a calcareous influence, <i>Ostrya virginiana</i> may be dominant in the subcanopy. The shrub strata vary in density from site to site, but the constant shrub species are <i>Hydrangea quercifolia</i> and <i>Viburnum acerifolium</i>. On high slopes and ridges, <i>Vaccinium arboreum, Vaccinium stamineum</i>, and <i>Vaccinium pallidum</i> become shrub components, sometimes dominating the shrub layers. The herbaceous stratum can be sparse but often has patches of local dominance by <i>Carex picta</i> (within its range), especially on lower to middle slopes. <i>Piptochaetium avenaceum</i> and <i>Vitis rotundifolia</i> are characteristic of occurrences on high slopes and ridges. Additional herbs with high constancy are <i>Polystichum acrostichoides</i> and <i>Chimaphila maculata</i>, although other species may be present in more mesic examples of this forest. |
Comm #11045
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Quercus alba - Nyssa sylvatica Sandstone Ridgetop Depression Forest
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accession code: VB.CC.35345.CEGL008440
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Southeastern Ecology Working Gro... |
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This community occurs in upland depressions on sandstone on ridgetops in the Cumberland Plateau of Alabama. <i>Quercus alba</i> and <i>Nyssa sylvatica</i> form an open canopy. Other canopy species are <i>Quercus falcata</i> and <i>Carya glabra</i>. Other species include <i>Acer rubrum var. rubrum, Diospyros virginiana, Pinus taeda, Smilax rotundifolia, Smilax glauca, Andropogon virginicus, Dichanthelium</i> sp., <i>Chamaecrista nictitans, Hypericum hypericoides</i>, and <i>Dichanthelium dichotomum var. dichotomum</i>. |
Comm #11046
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CEGL000901
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accession code: VB.CC.3504.CEGL000901
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
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Comm #11047
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Spartina patens - Schizachyrium maritimum - Solidago sempervirens Herbaceous Vegetation
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accession code: VB.CC.35174.CEGL008445
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Southeastern Ecology Working Gro... |
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This community is known from low sand deposits particularly on back sides of barrier islands or on low grassy barrier spits. It is an upland dune grass community dominated by <i>Spartina patens</i>. Other typical herbaceous species include <i>Solidago sempervirens var. mexicana, Hydrocotyle bonariensis, Fimbristylis caroliniana, Panicum amarum, Schizachyrium maritimum, Strophostyles helvula, Panicum repens, Acmella oppositifolia var. repens, Physalis angulata, Conyza canadensis var. pusilla</i>, and <i>Diodia teres</i>. Scattered shrubs and woody vines are sometimes present, including <i>Iva imbricata</i> and <i>Cynanchum angustifolium</i>. |
Comm #11048
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CEGL001908
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accession code: VB.CC.4462.CEGL001908
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
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Comm #11049
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Hippuris vulgaris Herbaceous Vegetation
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accession code: VB.CC.26712.HIPPURISVULGARI
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Western Ecology Working Group of... |
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Comm #11050
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Marine Cobble - Gravel Shore Sparse Vegetation
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accession code: VB.CC.25548.MARINECOBBLEGRA
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Midwestern Ecology Working Group... |
0
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