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Add/Drop	Name	Reference	Plots↓	Description
Comm #511	Juniperus communis Wooded Shrubland Alliance » more details accession code: VB.cc.30089.JUNIPERUSCOMMUN	NVC 2004	37
Comm #512	Platanus wrightii Temporarily Flooded Woodland Alliance » more details accession code: VB.cc.30771.PLATANUSWRIGHTI	NVC 2004	37
Comm #513	Pinus virginiana - Juniperus virginiana - Quercus rubra / Solidago arguta var. harrisii - Opuntia humifusa Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:34935-{65CF1066-4265-4B2C-B249-5098AB0575CB}	NatureServe Biotics 2019	37	This shale barren woodland occurs on steep unstable shale slopes with areas of exposed bedrock in the central Appalachian Mountains from south-central Pennsylvania to southwestern Virginia. Most are at less than 400 m elevation, but they can range up to 750 m. Soils are acidic and available moisture is scarce. Most substrates are shale-derived but sandstone may also be a component. Large expanses of exposed bedrock are typical. Usually with a woodland or patchy woodland physiognomy, this association may occasionally occur as closed forest or sparse shrubland. The canopy is usually a mixture of oak and conifers but may have either one or the other dominant. Canopy cover varies widely but is typically less than 70% and may be sparse. The herb layer is likewise variable but is commonly less than 25%. Canopy dominants are <i>Pinus virginiana, Juniperus virginiana</i> (often subordinate but occasionally dominant), <i>Quercus rubra</i>, and <i>Quercus montana</i>. Associates vary and include <i>Quercus stellata, Carya glabra, Celtis tenuifolia, Quercus alba, Carya tomentosa</i>, and <i>Fraxinus americana</i>. Shrubs are typically sparse or scattered and include <i>Quercus ilicifolia, Rhus copallinum, Hypericum prolificum</i>, and less frequently <i>Amelanchier arborea, Vaccinium stamineum, Vaccinium pallidum, Rhus aromatica</i>, and <i>Rosa carolina</i>. <i>Carex pensylvanica</i> and <i>Danthonia spicata</i> are the most common ground-layer species; other graminoids that may be locally common at some sites include <i>Schizachyrium scoparium</i> and <i>Deschampsia flexuosa</i>. Typical forbs include <i>Antennaria plantaginifolia, Cunila origanoides, Houstonia longifolia, Opuntia humifusa, Selaginella rupestris, Hedeoma pulegioides, Pellaea atropurpurea, Polygonum scandens var. cristatum</i>, and <i>Cheilanthes lanosa</i>, as well as the shale barren endemics (or near-endemics) <i>Paronychia montana, Antennaria virginica, Allium oxyphilum, Packera antennariifolia, Oenothera argillicola, Solidago arguta var. harrisii, Scutellaria ovata</i>, and <i>Trifolium virginicum</i>. Southern examples may contain <i>Clematis albicoma</i> and/or <i>Taenidia integerrima</i>. This association differs from other acidic shale barren types in its more northerly distribution, and the absence of the more southerly shale barren endemics (or near-endemics) <i>Allium cernuum, Arabis serotina</i>, and <i>Clematis coactilis</i>, as well as the absence of some other species typical of the more species-rich barrens, such as <i>Silene caroliniana, Penstemon canescens</i>, and <i>Penstemon pallidus</i>. Indicators include <i>Opuntia humifusa</i> and <i>Solidago arguta var. harrisii</i>.
Comm #514	Pinus palustris / Quercus margarettae - Quercus incana / Schizachyrium scoparium Atlantic Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:32929-{4FE59353-FEF3-4456-85EA-A4770F96142A}	NatureServe Biotics 2019	37	This is a subxeric <i>Pinus palustris</i>-dominated woodland of the Outer Coastal Plain of South Carolina, found on well-drained (but not xeric) sandy soils, including the Chipley series. <i>Pinus palustris</i> dominates the open canopy of stands of this association. The subcanopy contains <i>Quercus margarettae</i> and <i>Quercus incana</i>. Some <i>Quercus falcata</i> and <i>Quercus laevis</i> may also be present. <i>Schizachyrium scoparium</i> is a typical herbaceous component; wiregrasses (<i>Aristida</i> spp.) are not typically found, as this association is restricted to the wiregrass gap of central South Carolina. <i>Pteridium aquilinum</i> is also common, particularly under certain fire regimes. Other trees present include <i>Quercus hemisphaerica, Quercus laevis</i>, and <i>Quercus marilandica var. marilandica</i>.
Comm #515	Picea mariana / Pleurozium schreberi Forest » more details accession code: urn:lsid:vegbank.org:commConcept:31355-{16EBCA9F-BC00-4CCC-8792-8B5F7E9992B0}	NatureServe Biotics 2019	37	This black spruce / feathermoss forest is found widely throughout the subboreal regions of Canada and into adjacent areas of the midwestern United States, especially Minnesota. Stands occur on level to gently sloping ground. Soils are typically moderately well-drained, coarse loams, sands, and silts. The canopy of this community is closed and heavily dominated by <i>Picea mariana</i> with small amounts of <i>Abies balsamea, Betula papyrifera, Picea glauca, Pinus banksiana</i>, and <i>Populus tremuloides</i>. The shrub and herb layers are poorly developed. Species that are most abundant in these layers include the shrubs <i>Corylus cornuta, Gaultheria procumbens, Ledum groenlandicum, Rosa acicularis, Vaccinium angustifolium</i>, and <i>Vaccinium myrtilloides</i> and the herbs <i>Eurybia macrophylla, Cornus canadensis, Equisetum arvense</i>, and <i>Maianthemum canadense</i>. Feathermosses, particularly <i>Pleurozium schreberi</i>, are very abundant.
Comm #516	Salix lasiolepis / Baccharis salicifolia Shrubland » more details accession code: VB.CC.37382.CEGL002875		37	This shrubland association occurs on gentle- to high-gradient streams at elevations between 259 and 1118 m (849-3667 feet), on alluvium and sand and sandy loam soils. <i>Salix lasiolepis</i> codominates with <i>Baccharis salicifolia</i> in the shrub layer. <i>Quercus agrifolia</i> is occasionally found at low cover in the overstory tree layer. Other shrubs present include <i>Baccharis pilularis, Centaurea melitensis, Eriodictyon crassifolium, Ceanothus leucodermis</i>, and <i>Ricinus communis</i>. The herbaceous layer is diverse and occasionally includes the forbs <i>Artemisia douglasiana, Conium maculatum, Brassica nigra, Lotus unifoliolatus var. unifoliolatus (= Lotus purshianus var. purshianus), Rumex salicifolius</i>, and <i>Urtica dioica</i>, and the graminoids <i>Arundo donax, Bromus diandrus, Bromus rubens (= Bromus madritensis ssp. rubens), Piptatherum miliaceum</i>, and <i>Typha</i> spp.
Comm #517	Taxodium ascendens / Woodwardia virginica Swamp Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:33229-{D8FDE372-4708-452F-83F5-2346B8CE501F}	NatureServe Biotics 2019	37	This open-structured savanna or woodland encompasses very acidic, species-poor stands in which <i>Taxodium ascendens</i> dominates the open canopy. The subcanopy stratum is usually poorly developed. <i>Nyssa biflora, Pinus taeda, Pinus serotina, Liquidambar styraciflua</i>, and other wetland trees or shrubs may or may not be present. The shrub stratum is usually poorly developed as well, though scattered to moderately dense shrubs sometimes occur. Shrubs include <i>Ilex amelanchier, Eubotrys racemosa, Cyrilla racemiflora</i>, and <i>Lyonia lucida</i>. The herb stratum is dominated by <i>Woodwardia virginica</i>. As far as is known, this community type occurs only in highly acidic, seasonally flooded depressions in North Carolina and South Carolina where it is restricted to the region of clay-based Carolina bays on the southern part of the Inner Coastal Plain.
Comm #518	Nyssa biflora / Ilex myrtifolia / Carex glaucescens - Eriocaulon compressum Swamp Forest » more details accession code: urn:lsid:vegbank.org:commConcept:33499-{F99A285D-AD93-4973-AE6A-183D2D7719DF}	NatureServe Biotics 2019	37	This dome swamp community occurs in the East Gulf Coastal Plain of Florida and Alabama and the South Atlantic Coastal Plain of Florida and possibly Georgia. The canopy is strongly dominated by <i>Nyssa biflora</i>, often with scattered <i>Taxodium ascendens</i>, and sometimes low-canopy <i>Ilex myrtifolia</i>. The subcanopy is poorly developed and consists of <i>Ilex myrtifolia</i> and <i>Cyrilla parvifolia</i>. <i>Magnolia virginiana</i> and <i>Persea palustris</i> may be present. Shrubs are typically not present or, at least, not abundant, but may include <i>Lyonia lucida, Clethra alnifolia, Hypericum chapmanii, Hypericum brachyphyllum, Smilax laurifolia</i>, and <i>Smilax walteri</i>. The herbaceous layer includes <i>Eriocaulon compressum, Eriocaulon decangulare var. decangulare, Carex glaucescens, Lycopodiella alopecuroides, Coreopsis nudata, Juncus repens, Sabatia bartramii, Rhynchospora</i> spp., <i>Rhexia</i> spp., <i>Xyris</i> spp., <i>Woodwardia virginica</i>, and <i>Erigeron vernus</i>. <i>Tillandsia bartramii</i> can be an abundant epiphyte. This association occurs in small seasonally to semipermanently flooded depressions surrounded by <i>Pinus palustris - Pinus elliottii var. elliottii</i> flatwoods. Fire periodically burns into the <i>Nyssa</i> ponds.
Comm #519	Celtis laevigata - Fraxinus pennsylvanica - (Juglans nigra) / Asimina triloba / Carex grayi Floodplain Forest » more details accession code: urn:lsid:vegbank.org:commConcept:33518-{A1D586CF-6FEF-4D02-A445-68D4892F1E49}	NatureServe Biotics 2019	37	This association is a levee forest of brownwater rivers in the Atlantic Coastal Plain of the Carolinas, possibly ranging north and south to adjacent states. It has been described from the Congaree River, South Carolina, and from the Roanoke River, North Carolina, where it occurs in two more-or-less distinct phases. Both phases have closed canopies codominated by <i>Acer negundo, Celtis laevigata, Fraxinus pennsylvanica, Liquidambar styraciflua</i>, and <i>Ulmus americana</i>. Subcanopies range from dense to sparse and are dominated by <i>Asimina triloba</i>. The relative abundance and diversity of understory herbs (e.g., <i>Carex grayi, Carex louisianica</i>) are inversely related to the abundance of <i>Asimina triloba</i>; however, <i>Arundinaria gigantea</i> often has a higher abundance under <i>Asimina</i>. Vines are also common, and important species include <i>Toxicodendron radicans, Parthenocissus quinquefolia</i>, and <i>Smilax rotundifolia</i>. In the Congaree Swamp National Monument, South Carolina, the mostly closed canopy of this community is dominated by <i>Celtis laevigata, Juglans nigra, Acer negundo, Liquidambar styraciflua</i>, and <i>Ulmus americana</i>. These species are important in the well-developed subcanopy also. These occurrences differ from the Roanoke River occurrences by having a lesser amount of tree importance contributed by <i>Fraxinus pennsylvanica</i> and by having substantial amounts of <i>Juglans nigra</i>. A variety of other tree species are possible in these strata; these species include <i>Fraxinus pennsylvanica, Platanus occidentalis, Quercus laurifolia, Diospyros virginiana, Carya cordiformis, Quercus pagoda, Morus rubra</i>, and others. The shrub layer ranges from sparse to well-developed and is dominated by <i>Asimina triloba</i> with <i>Lindera benzoin, Ilex decidua</i>, and likely other species present as well. The moderately dense understory is dominated by <i>Elymus virginicus</i>. Other typical species include <i>Carex grayi, Carex retroflexa, Chasmanthium latifolium, Elephantopus carolinianus, Leersia lenticularis, Polygonum virginianum, Sanicula canadensis, Carex bromoides, Glyceria striata, Laportea canadensis</i>, and others. The vine stratum is moderate, and many species are possible. Among these are <i>Bignonia capreolata, Berchemia scandens, Parthenocissus quinquefolia, Smilax bona-nox, Smilax tamnoides, Vitis rotundifolia, Matelea carolinensis, Cocculus carolinus</i>, and <i>Vitis vulpina</i>.
Comm #520	Andropogon gerardii - Panicum virgatum - Baptisia australis Riverscour Wet Meadow » more details accession code: urn:lsid:vegbank.org:commConcept:34930-{CB3B834F-A0F4-4E64-90B8-5A0BEDC9D952}	NatureServe Biotics 2019	37	This community is found in the east-central United States along high-gradient sections of major rivers, such as in gorges and along the fall-line. It usually occupies rocky areas within the active channel shelf at an intermediate level above the low-water level and the bank-full level. Flood scouring and ice floods are powerful and ecologically important abrasive forces that shape the physiognomy and composition of this association. Soils are rapidly drained Psamments. Often, soil material is restricted to the narrow interstices of tightly packed boulders, or to small crevices in bedrock exposures. This community is characterized by a luxuriant growth of the robust grasses <i>Andropogon gerardii, Sorghastrum nutans, Panicum virgatum</i>, and <i>Spartina pectinata</i> which resembles prairie vegetation. <i>Tripsacum dactyloides</i> may also occur. Many of the forbs are also typical of prairies. Characteristic species include <i>Baptisia australis, Allium cernuum, Aristida purpurascens, Bidens frondosa, Chasmanthium latifolium, Clematis viorna, Eleocharis compressa, Conoclinium coelestinum, Coreopsis tripteris, Eupatorium serotinum, Eutrochium fistulosum, Lespedeza violacea, Packera aurea, Physostegia virginiana, Pycnanthemum virginianum, Solidago rupestris, Teucrium canadense, Veronicastrum virginicum, Zizia trifoliata</i>, and <i>Zizia aurea</i>. Scattered and flood-battered shrubs and tree saplings often occur.