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Comm #971	Pinus palustris - Pinus serotina / Sporobolus pinetorum - Ctenium aromaticum - Eriocaulon decangulare var. decangulare Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:33288-{AF83A6FD-5D3E-4FB8-B7BC-F1C22BF4ADD8}	NatureServe Biotics 2019	19	This saturated longleaf pine - pond pine woodland association is only found on very wet clay soils of the Atlantic Coastal Plain of North Carolina and is one of the most naturally restricted of the longleaf pine communities in the area. The open canopy of this association is dominated by a variable combination of <i>Pinus palustris</i> and <i>Pinus serotina</i>. Some characteristic herbs include <i>Sporobolus pinetorum, Ctenium aromaticum</i>, and <i>Eriocaulon decangulare var. decangulare</i>. More information is to be added from North Carolina Vegetation Survey data.
Comm #972	Typha (angustifolia, latifolia) - (Schoenoplectus spp.) Semipermanently Flooded Herbaceous Alliance » more details accession code: VB.cc.30872.TYPHAANGUSTIFOL	NVC 2004	19
Comm #973	Populus angustifolia - Juniperus scopulorum Riparian Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:31548-{C7AA6C13-B30E-4138-88BA-0FE2A6FAD22C}	NatureServe Biotics 2019	19	This semi-riparian woodland association occurs in north-central Wyoming, western Colorado and northern New Mexico on terraces or slopes of gorges, ravines, and moderate-sized intermittent or perennial drainages between 1740 and 2400 m (5725-7875 feet) elevation. This type usually occurs on high, dry stream terraces with level slopes and a sandy surface soil texture. Stands are infrequently flooded (10- to 100-year recurrence intervals). The vegetation is characterized by moderately open canopies (25-60% cover) dominated by <i>Populus angustifolia</i>, with <i>Juniperus scopulorum</i> or occasionally <i>Juniperus monosperma, Betula occidentalis</i>, or <i>Pinus edulis</i> in the subcanopy. An open grassy understory with abundant <i>Sporobolus cryptandrus</i> is characteristic, although other grasses such as <i>Carex geyeri, Juncus arcticus ssp. littoralis, Leymus cinereus</i>, and <i>Poa fendleriana</i> may also be present. In disturbed stands the native grasses may have been replaced by exotic species such as <i>Bromus inermis</i>. Although shrubs are uncommon, those present, such as <i>Brickellia californica, Quercus gambelii, Artemisia tridentata, Mahonia repens, Purshia tridentata, Rosa woodsii</i>, and <i>Symphoricarpos oreophilus</i>, reflect relatively dry site conditions. The herbaceous understory also reflects open, dry site conditions. Facultative and upland forbs such as <i>Thalictrum fendleri, Achillea millefolium, Maianthemum stellatum, Solidago nemoralis</i>, and <i>Penstemon barbatus</i> are common. In open areas <i>Bouteloua curtipendula</i> is common. Regardless of the drier conditions, a variety of native wetland indicators can occur, including <i>Juncus effusus, Glyceria striata, Carex nebrascensis, Agrostis exarata, Rudbeckia laciniata, Equisetum arvense, Epilobium ciliatum, Mertensia ciliata</i>, and <i>Equisetum laevigatum</i>. Many stands have decadent <i>Populus angustifolia</i> trees that are being replaced by <i>Juniperus scopulorum</i>. Other stands periodically flood and retain a large amount of woody debris. In all cases the vegetation and topographic position indicate a community that is becoming isolated from the water table. As the water table drops, the facultative and obligate wetland plants will be replaced by upland species.
	Suaeda nigra / Lepidium dictyotum » more details accession code: NOT CURRENTLY ACCEPTED	Great Valley Classification	19
Comm #974	Acer negundo / Prunus virginiana Floodplain Forest » more details accession code: urn:lsid:vegbank.org:commConcept:29537-{75F1F6E1-5005-4993-9EC3-FE10BA5F4EDC}	NatureServe Biotics 2019	19	This box-elder riparian forest is found on floodplains at warm elevations in the western Great Plains of the United States, as well as in the Black Hills region and the Colorado Plateau. This is an early-successional community dominated by <i>Acer negundo</i>. Stands occur on level to gently sloping sites between 1067 and 1800 m (3500-5900 feet) elevation. Aspect is not important, but in northwestern Colorado, stands are limited to narrow drainages that are oriented north-south. Soils are poorly developed and derived from alluvium or colluvium. Tree cover may be somewhat sparse to high; stands typically have 10-25% cover but may have cover as high as 60% in narrow canyons. Other tree species may be present to codominant, including <i>Ulmus americana, Quercus macrocarpa, Fraxinus pennsylvanica</i>, and <i>Populus deltoides</i>. The shrub understory is well-developed and may be more than 2 m high; exact composition will vary by region. <i>Prunus virginiana, Rhus trilobata, Cornus sericea, Symphoricarpos occidentalis, Ribes aureum, Artemisia tridentata ssp. tridentata, Mahonia repens</i>, and <i>Toxicodendron pubescens</i> are common, although at Wind Cave National Park <i>Prunus virginiana</i> may be absent. Total shrub cover (tall and short shrubs) is often greater than 50%. Herbaceous cover is variable but usually less than 50% and often is diverse. Species composition also varies, although graminoids tend to be dominant; common species include <i>Poa pratensis, Piptatheropsis micrantha, Poa fendleriana, Elymus lanceolatus, Bromus tectorum, Heterotheca villosa, Clematis ligusticifolia, Achillea millefolium, Monarda fistulosa</i>, and <i>Apocynum cannabinum</i>.
Comm #975	Populus deltoides / Symphoricarpos occidentalis Floodplain Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:29569-{8919B9B2-A1B3-4D1B-95FB-CEF1295EA989}	NatureServe Biotics 2019	19	This riparian woodland community is found in the northwestern Great Plains of the United States and southern Canada on medium to coarse-textured alluvial soils on the floodplains of major rivers. The floodplains are both seasonally inundated and subirrigated. It is found more rarely at higher elevations in the mountains of eastern Wyoming and western South Dakota. This community is dominated by a single deciduous tree species, <i>Populus deltoides</i>. In some stands other species, such as <i>Acer negundo</i> and <i>Fraxinus pennsylvanica</i>, may contribute to the canopy. The tallest trees exceed 15 m. The shrub layer is typically 0.5-1 m tall. It is dominated by <i>Symphoricarpos occidentalis</i> and commonly includes <i>Juniperus scopulorum</i> and <i>Rosa</i> spp. In Wyoming, <i>Ericameria nauseosa</i> is present and increases with heavy grazing. The herbaceous layer usually includes <i>Pascopyrum smithii</i>. Weedy species such as <i>Melilotus officinalis, Taraxacum officinale</i>, and <i>Poa secunda</i> are very common, especially in the presence of grazing. <i>Maianthemum stellatum</i> is abundant only where grazing is absent.
Comm #976	Carex aquatilis - Carex utriculata Wet Meadow » more details accession code: urn:lsid:vegbank.org:commConcept:30712-{B6B7D809-8530-44E1-8A81-C843C71F76D8}	NatureServe Biotics 2019	19	This common wetland vegetation is located throughout the Mountain West. It generally occurs in small to moderate-sized patches in very shallow, slow-moving to still water or on saturated soils near low-order streams, lakes, and backwater areas of larger rivers. It occurs in flat or gently sloped wet meadows and swales located in broad, glaciated, subalpine meadows that remain saturated with snowmelt runoff for most of the growing season between 1122 and 3385 m (3680-11,100 feet) elevation. It is also often associated with beaver activity. Meadows supporting this association are seasonally flooded with soil saturated or flooded through the summer. Soils are often organic, thick peat or sandy clays, sandy clay loams originating from glacial till. This association is recognized by the presence of both <i>Carex aquatilis</i> and <i>Carex utriculata</i> in roughly equal proportions in the herbaceous layer. This plant association has relatively low species diversity due to saturated soil conditions. <i>Carex aquatilis</i> and <i>Carex utriculata</i> codominate the association. Both species are present in equal or near-equal amounts. For example, a stand with 10% cover of each <i>Carex</i> species would classify as this type, however, a stand with 10% <i>Carex aquatilis</i> and 80% <i>Carex utriculata</i> would classify as <i>~Carex utriculata</i> Wet Meadow (CEGL001562)$$. Other graminoid and forb species may also be present.
Comm #977	Hudsonia tomentosa / Panicum amarum var. amarulum Dwarf-shrubland » more details accession code: urn:lsid:vegbank.org:commConcept:32799-{0CD83E91-030E-4B0B-B163-B472BE4F9841}	NatureServe Biotics 2019	19	This association is a maritime beach heather community of mid-Atlantic sand dunes. The unstable substrate is influenced by wind-deposited sand and supports no soil development; large patches of sparsely vegetated or unvegetated sand are common. The community is characterized by <i>Hudsonia tomentosa</i> occurring as discrete patches that may coalesce into a dense mat on older, more stabilized dunes. A number of other shrubs such as <i>Morella pensylvanica, Morella cerifera, Pinus taeda</i> saplings, and rarely <i>Prunus maritima</i> may occur but are low in abundance and cover. <i>Schizachyrium littorale, Ammophila breviligulata, Aristida tuberculosa, Spartina patens</i>, and <i>Panicum amarum var. amarulum</i> are common grasses of this community, and <i>Toxicodendron radicans</i> is a common vine. Other herbaceous associates include <i>Lechea maritima, Cyperus grayi, Artemisia stelleriana, Chamaesyce polygonifolia, Solidago sempervirens</i>, and <i>Diodia teres</i>. Small saplings of <i>Pinus taeda</i> may occur. This community is locally common on coastal dunes from New Jersey to northern North Carolina.
Comm #978	Polygonum (hydropiperoides, punctatum) - Leersia spp. Shoreline Wet Meadow » more details accession code: urn:lsid:vegbank.org:commConcept:33123-{6DEC8281-4E08-4769-828A-CC2A78FFC7A4}	NatureServe Biotics 2019	19	This association incorporates vegetation of beaver ponds and other semipermanent impoundments in the Piedmont, Ridge and Valley, South Atlantic Coastal Plain, Mississippi River Alluvial Plain, Upper East Gulf Coastal Plain, scattered localities in the Blue Ridge, and possibly other adjacent provinces. Stands of this vegetation are dominated by some combination of <i>Polygonum punctatum, Polygonum hydropiperoides, Leersia lenticularis, Leersia oryzoides</i>, and/or <i>Leersia virginica</i>. Other herbaceous species present include <i>Saururus cernuus, Proserpinaca</i> sp., <i>Bidens aristosa</i>, and <i>Xanthium strumarium</i>. Scattered individuals of <i>Cephalanthus occidentalis</i> and <i>Acer saccharinum</i> may be present. A Piedmont North Carolina example contains <i>Impatiens capensis, Boehmeria cylindrica</i>, and the exotic <i>Murdannia keisak</i>.
Comm #979	Quercus alba - Quercus rubra - Quercus montana - Tilia americana var. caroliniana / Ostrya virginiana Forest » more details accession code: urn:lsid:vegbank.org:commConcept:33327-{0072A414-9DFF-45A7-BA24-C4425A3AC119}	NatureServe Biotics 2019	19	This Piedmont forest often occurs in moderately protected situations on lower slopes of escarpments, on alluvial terraces, in ravine bottoms, or in rocky streambeds, and possibly in other situations in which the surface is very rocky and the substrate is basic. Many occurrences are on mafic rocks. The mixed canopy is dominated by <i>Quercus alba, Carya tomentosa, Tilia americana var. caroliniana, Quercus rubra var. rubra, Fraxinus americana, Quercus montana, Liquidambar styraciflua</i> and <i>Liriodendron tulipifera</i>. The subcanopy is dominated by <i>Ostrya virginiana, Carpinus caroliniana</i>, and <i>Cornus florida</i>. Other common species in the canopy and subcanopy include <i>Acer floridanum, Acer leucoderme, Acer rubrum var. rubrum, Cercis canadensis var. canadensis, Platanus occidentalis, Oxydendrum arboreum, Juglans nigra, Prunus serotina var. serotina, Aesculus sylvatica, Quercus phellos, Quercus nigra, Sassafras albidum</i>, and <i>Ulmus alata</i>. Shrubs of this community include <i>Viburnum rufidulum, Calycanthus floridus, Hydrangea arborescens</i>, and <i>Euonymus americanus</i>. Common herbs and vines are <i>Actaea racemosa, Asplenium platyneuron var. platyneuron, Galium circaezans, Hepatica nobilis var. obtusa, Hexastylis arifolia var. arifolia, Parthenocissus quinquefolia, Polystichum acrostichoides, Prenanthes altissima, Toxicodendron radicans, Desmodium nudiflorum, Dichanthelium</i> spp., <i>Maianthemum racemosum ssp. racemosum, Elymus virginicus var. virginicus</i>, and <i>Vitis rotundifolia</i>. The exotics <i>Ailanthus altissima, Albizia julibrissin, Lonicera japonica</i>, and <i>Lonicera maackii</i> are common in this forest.