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Add/Drop	Name	Reference	Plots↓	Description
Comm #541	Rhus integrifolia - Artemisia californica - Eriogonum cinereum Shrubland » more details accession code: VB.CC.37429.CEGL003719		36	This shrubland association occurs on moderate to abrupt slopes of variable aspect at low elevations between 4 and 280 m. It is characterized by a dominance of <i>Rhus integrifolia</i> and a subdominance of <i>Artemisia californica</i> and <i>Eriogonum cinereum</i> in the shrub layer. The herbaceous layer is sparse and composed mostly of non-native grasses and herbs. The emergent tree layer is generally absent.
Comm #542	Acer rubrum - Nyssa sylvatica - Magnolia virginiana / Viburnum nudum var. nudum / Osmunda cinnamomea - Woodwardia areolata Forest » more details accession code: VB.CC.37494.CEGL006238		35	This acidic swamp forest of the eastern middle-latitude states is a nutrient-poor wetland forest occurring in groundwater-saturated stream bottoms and poorly drained depressions. Soils are typically moderately deep to deep muck over mineral soil, with pools of standing water at the surface. Acidic waters originate from groundwater seepage, with little to no overland seasonal flooding. Most sites can be characterized as "groundwater slope wetlands" (<i>sensu</i> Golet et al. 1993) with a flow-through hydrology. This community is characterized by <i>Acer rubrum</i> and <i>Nyssa sylvatica</i> in the canopy, which may be quite open in some examples. Canopy associates include <i>Magnolia virginiana, Liquidambar styraciflua</i>, and <i>Persea palustris</i>, plus occasional incidental <i>Liriodendron tulipifera</i> or <i>Pinus taeda</i>. Upland trees may occur on drier hummocks. The shrub layer is characterized by <i>Vaccinium corymbosum</i>, as well as <i>Clethra alnifolia, Ilex verticillata, Ilex opaca, Viburnum nudum var. nudum, Lindera benzoin</i>, and <i>Rhododendron viscosum</i>. The herbaceous layer varies from dense to sparse and may include <i>Symplocarpus foetidus, Triadenum virginicum, Osmunda regalis var. spectabilis, Woodwardia areolata, Carex folliculata, Carex lonchocarpa, Carex collinsii, Carex atlantica, Bartonia paniculata, Parnassia asarifolia, Helonias bullata, Chelone glabra, Oxypolis rigidior</i>, and <i>Osmunda cinnamomea</i>. <i>Sphagnum</i> spp. and other mosses are common.
Comm #543	Rhus microphylla Shrubland Alliance » more details accession code: VB.cc.30822.RHUSMICROPHYLLA	NVC 2004	35
Comm #544	Pinus palustris / Quercus laevis / Stipulicida setacea - Selaginella acanthonota Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:32457-{24856BDD-B6F6-41E6-94CD-09C6858F7081}	NatureServe Biotics 2019	35	This is one of the driest longleaf pine types that occurs on coarse, infertile sands on the Atlantic Coastal Plain of North Carolina and northern South Carolina. The sparse canopy is dominated by <i>Pinus palustris</i> with strong dominance of <i>Quercus laevis</i> in the subcanopy/shrub layer. The herbaceous layer is sparse and species-poor, lacking <i>Aristida stricta</i> and characterized by <i>Selaginella acanthonota</i> and <i>Stipulicida setacea</i>.
Comm #545	Liquidambar styraciflua - Acer rubrum - Nyssa biflora / Carex joorii Swamp Forest » more details accession code: urn:lsid:vegbank.org:commConcept:34870-{D92DF113-9329-4B07-9A2B-B06FC3EF40DC}	NatureServe Biotics 2019	35	This seasonally flooded hardwood forest community occurs in groundwater basins on the Coastal Plain of Maryland and Virginia. The canopy is of variable closure and is dominated by <i>Liquidambar styraciflua, Acer rubrum</i>, and <i>Nyssa biflora</i>. Associated canopy species include <i>Quercus lyrata, Quercus laurifolia</i> and <i>Diospyros virginiana</i>. The shrub layer is composed of <i>Eubotrys racemosa</i> and scattered <i>Cephalanthus occidentalis</i>. The herbaceous layer is characterized by <i>Carex joorii, Carex striata, Panicum verrucosum, Fimbristylis autumnalis</i>, and others.
Comm #546	(Pinus palustris, Pinus serotina) / Ctenium aromaticum - Muhlenbergia expansa - Calamovilfa brevipilis Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:32531-{6EE9C828-EE0C-4006-B1D3-17CAB3510E4B}	NatureServe Biotics 2019	35	This community occurs in narrow bands between various sandhill communities and streamhead pocosins, in the Fall-line Sandhills of North Carolina and South Carolina. In floristic composition it typically resembles Outer Coastal Plain savannas and flatwoods, but lacks some of the Outer Coastal Plain species, and has some species (often from the adjacent sandhill and streamhead pocosins) not present in Outer Coastal Plain savannas and flatwoods. The fire dynamics of this community are also different, since it occurs in narrow bands between peaty wetlands and xeric sandhills, rather than in large, flat expanses. Many of the plant species in this community occur in no other community in the landscape. Species found in this association which are more prevalent in this community than in Outer Coastal Plain savannas and flatwoods include <i>Oxydendrum arboreum, Calamovilfa brevipilis, Chasmanthium laxum, Doellingeria sericocarpoides, Glyceria obtusa</i>, and <i>Hexastylis minor</i>. Species more prevalent in Outer Coastal Plain savannas and flatwoods longleaf pine communities than in this one include <i>Lysimachia loomisii, Pinguicula caerulea, Pinguicula caerulea, Pinguicula pumila, Dionaea muscipula, Pyxidanthera barbulata, Arnoglossum ovatum, Cirsium horridulum, Carphephorus odoratissimus, Pterocaulon pycnostachyum, Bigelowia nudata ssp. nudata, Helianthus heterophyllus, Balduina uniflora, Coreopsis falcata, Helenium pinnatifidum, Helenium vernale, Amphicarpum purshii, Paspalum praecox, Anthaenantia rufa, Andropogon glaucopsis, Rhynchospora chapmanii, Rhynchospora latifolia, Pleea tenuifolia, Lilium catesbaei ssp. catesbaei, Platanthera nivea, Platanthera integra, Sarracenia minor, Drosera brevifolia, Polygala brevifolia</i>, and <i>Polygala hookeri</i>.
Comm #547	Leersia hexandra - (Panicum verrucosum, Scleria reticularis) Marsh » more details accession code: urn:lsid:vegbank.org:commConcept:32893-{CEE5F1C9-B25C-46E5-8ADF-B6C524C09FFF}	NatureServe Biotics 2019	35	This depression pond type covers examples which are typically found in small, flat Carolina bays or other depressions with loamy soils and a hydroperiod slightly shorter than other marsh types. The stands of vegetation are dominated by or have a substantial component of <i>Leersia hexandra</i>. The vegetation varies dramatically in response to rainfall cycles. In wetter periods, <i>Leersia hexandra</i> dominates more strongly, while in drier times <i>Panicum verrucosum</i> and <i>Scleria reticularis</i> are also abundant. In long droughts, <i>Panicum hemitomon</i> and various woody species may invade.
Comm #548	Taxodium distichum - Nyssa biflora / Fraxinus caroliniana / Lyonia lucida Floodplain Forest » more details accession code: urn:lsid:vegbank.org:commConcept:33511-{8290779E-639F-4DE0-8A3C-56AC923EC968}	NatureServe Biotics 2019	35	This association includes very wet forests of the southeastern Coastal Plain in North Carolina and South Carolina that are flooded by river overbank flow for long periods. It occurs along Coastal Plain streams which lack clay sediment, where <i>Nyssa aquatica</i> is not a significant component of the canopy. This community occupies the most acidic and clay-free streams and consequently is found within coarse-sandy landscapes. Forests are dominated by combinations of <i>Nyssa biflora, Taxodium distichum</i>, and <i>Taxodium ascendens</i>.
Comm #549	Betula lenta - Quercus montana / Parthenocissus quinquefolia Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:35191-{3DFB252C-A005-4144-A7BF-D7259EADAD8B}	NatureServe Biotics 2019	35	This talus or rocky slope woodland community occurs in the central Appalachian Mountains and extends west to the Western Allegheny Plateau in Pennsylvania. The substrate is generally quartzite or sandstone talus. Sites are usually steeply sloping, but the type also sometimes occurs on gentler benches and ridge crests. Soils, where present, are shallow, organic, acidic and infertile. The canopy is of variable cover but generally open with gnarled, widely spaced trees. Characteristic trees are birches, primarily <i>Betula lenta</i> but less frequently including <i>Betula papyrifera, Betula populifolia</i>, or <i>Betula alleghaniensis</i>, as well as <i>Nyssa sylvatica</i>. Other tree associates may include <i>Tsuga canadensis, Acer rubrum, Carya glabra, Quercus montana, Quercus alba, Quercus rubra, Quercus velutina</i>, or <i>Quercus coccinea</i>. Typical shrubs include <i>Acer spicatum, Acer pensylvanicum, Amelanchier arborea, Castanea dentata, Kalmia latifolia, Hamamelis virginiana, Menziesia pilosa, Ribes rotundifolium, Vaccinium angustifolium, Vitis</i> spp., <i>Toxicodendron radicans, Smilax rotundifolia</i>, and <i>Parthenocissus quinquefolia</i>. Ferns characterize the herb layer and may include <i>Dryopteris marginalis, Polypodium virginianum, Woodsia obtusa</i>, or <i>Asplenium platyneuron</i>. The forbs <i>Aralia nudicaulis, Heuchera</i> spp., and <i>Scutellaria saxatilis</i> are also well-adapted to the bouldery habitats. Lichens, especially the rock-tripes <i>Lasallia papulosa</i> and <i>Umbilicaria mammulata </i>and the foliose species <i>Flavoparmelia baltimorensis</i>, characterize the nonvascular layer.
Comm #550	Platanus occidentalis - Acer saccharinum - Juglans nigra - Ulmus rubra Floodplain Forest » more details accession code: urn:lsid:vegbank.org:commConcept:35584-{CB9DEA25-6DFF-4E27-A556-A5A3B4941E9B}	NatureServe Biotics 2019	35	This sycamore - silver maple floodplain forest occurs along riverfronts in calcareous areas of the east-central United States, including forests along small streams. Stands are dominated by <i>Platanus occidentalis</i>, with a mixture of other species, including <i>Acer negundo, Acer saccharinum, Fraxinus americana, Fraxinus pennsylvanica, Juglans nigra, Ulmus americana</i>, and <i>Ulmus rubra</i>. Shrubs include <i>Asimina triloba</i> and <i>Lindera benzoin</i>. Vines may be abundant, including <i>Parthenocissus quinquefolia</i> and <i>Toxicodendron radicans</i>. Herbaceous species include <i>Arisaema triphyllum, Asarum canadense, Boehmeria cylindrica, Elymus virginicus, Pilea pumila, Polygonum virginianum</i>, and others.