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Name
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Reference
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Description |
Comm #761
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Pinus palustris / Serenoa repens - Ilex glabra Woodland » more details
accession code: urn:lsid:vegbank.org:commConcept:32525-{C699ACBD-65D6-405C-803B-B7EB057F50E8}
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NatureServe Biotics 2019 |
25
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This broadly defined community is a moderately to poorly drained longleaf flatwoods community, widespread in Florida, and extending north through Georgia to southeastern South Carolina, and probably west to southern Alabama and southern Mississippi. <i>Pinus palustris</i> dominates the open to fairly dense canopy. The shrub layer is characteristically dense, with <i>Serenoa repens</i> and <i>Ilex glabra</i> usually dominating; other shrubs include <i>Lyonia fruticosa, Lyonia lucida, Vaccinium myrsinites, Gaylussacia mosieri</i>, and <i>Morella cerifera</i>. The herb layer is poorly developed in this association, but patches of herbaceous cover may occur and are often dominated by <i>Aristida beyrichiana</i>. This community generally occurs on Spodosols; a spodic horizon is associated with seasonally saturated conditions. |
Comm #762
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Symphoricarpos occidentalis Shrubland » more details
accession code: urn:lsid:vegbank.org:commConcept:30040-{6AB0A28E-55C7-460F-AD20-5B4BCA5AD00A}
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NatureServe Biotics 2019 |
25
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This western snowberry shrubland is found in the western tallgrass, northern Great Plains, and in the foothills of the northern Rocky Mountains of the United States and Canada. Stands occur in mesic depressions and swales, typically surrounded by upland grassland communities. The soils are silts and loams. This type has three distinct vegetation layers, a shrub layer (approximately 80 cm tall), a graminoid-dominated layer (approximately 30 cm tall), and a forb-dominated layer (<20 cm tall). <i>Symphoricarpos occidentalis</i> is the predominant species in the shrub layer and at times forms almost monospecific stands. <i>Rosa woodsii</i> commonly occurs interspersed with the <i>Symphoricarpos occidentalis</i>. Other shrubs, such as <i>Rhus trilobata</i> and <i>Prunus virginiana</i>, often occur as thickets on the fringe of this community. <i>Rhus trilobata</i> and <i>Prunus virginiana</i> can reach 2 m or more. The herbaceous layer is poorly represented where the shrubs are dense, although <i>Poa pratensis</i> occurs in many stands. Common forbs include <i>Artemisia ludoviciana, Solidago</i> spp., and <i>Achillea millefolium</i>. Vines, such as <i>Parthenocissus vitacea</i>, are often found climbing through the shrubs. This type is frequently observed in heavily grazed meadows and prairies. |
Comm #763
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Betula occidentalis / Maianthemum stellatum Wet Shrubland » more details
accession code: urn:lsid:vegbank.org:commConcept:30071-{5F3654D3-528C-4B6E-8A9B-5D2FBB6ABFBC}
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NatureServe Biotics 2019 |
25
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This plant association occurs within the Intermountain West from Colorado north and west into the Pacific Northwest. It typically forms a tall band of shrubs (1.5-2.5 m [5-8 feet]) lining the channel of first- and second-order streams in the elevational range of 2000-2700 m (6400-8800 feet). At higher elevations, conifer trees on the upper slopes intermix with <i>Betula occidentalis</i> at the streambank. At lower elevations along sunny valley bottoms, well-developed, large occurrences occupy relatively flat stream benches and often extend away from the channel edge. Other shrubs that may be present include <i>Alnus incana ssp. tenuifolia, Cornus sericea, Salix exigua, Jamesia americana, Amelanchier utahensis, Prunus virginiana</i>, and <i>Salix monticola</i>. The undergrowth can be a sparse or thick carpet of grasses and forbs. In undisturbed stands, forb species richness can be high, with over 30 species in one stand, and may include species such as <i>Maianthemum stellatum, Heracleum maximum, Thalictrum fendleri</i>, and <i>Rudbeckia laciniata</i>. Graminoid cover is usually low but can include <i>Poa pratensis, Equisetum arvense, Carex utriculata</i>, and others. An abundance of non-native grass species is considered an indication of past or current heavy grazing. |
Comm #764
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Rhododendron catawbiense Shrubland » more details
accession code: urn:lsid:vegbank.org:commConcept:32678-{498CD8AB-564D-4A30-AEC0-57AAFD97E569}
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NatureServe Biotics 2019 |
25
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This evergreen shrubland occurs at the highest elevations, typically 1500-1980 m (5000-6500 feet), in the southern Appalachian Mountains on steep, exposed slopes, ridges, and rock outcrops. It occurs primarily in the northern portion of the Southern Appalachians, north of the Asheville Basin, in mountain ranges lacking <i>Pieris floribunda</i> and <i>Rhododendron carolinianum</i>. Greater than 75% of the shrub cover is composed of evergreen species, and the predominant shrub is <i>Rhododendron catawbiense</i>. Scattered trees contribute less than 1% cover, typically <i>Aronia melanocarpa, Abies fraseri</i>, and <i>Picea rubens</i>. Small openings in the shrub canopy are dominated by rock or herbs. Herb cover beneath the shrub canopy is absent or very sparse (<5%) and may include <i>Gaultheria procumbens, Galax urceolata, Epigaea repens, Medeola virginiana, Trillium undulatum, Melampyrum lineare, Dryopteris campyloptera, Houstonia serpyllifolia, Viola</i> spp., and <i>Carex debilis var. rudgei</i>. Mosses may be locally dominant at the base of <i>Rhododendron</i> clumps, often <i>Polytrichum commune</i> or bryophytes from adjacent <i>Picea - Abies</i> communities. This community can result from secondary succession after fire or logging or can occur as a topo-edaphic climax on steep, exposed sites. Occurrences may range in size from 0.5-200 hectares. This community can grade into or occur adjacent to high-elevation rock outcrop communities, montane grass-dominated communities, or forests dominated by <i>Picea rubens, Abies fraseri</i>, and northern hardwood species such as <i>Fagus grandifolia, Acer saccharum</i>, and <i>Betula alleghaniensis</i>. |
Comm #765
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Danthonia compressa - (Sibbaldiopsis tridentata) Grassland » more details
accession code: urn:lsid:vegbank.org:commConcept:33077-{A2E9DA82-501F-4BDD-AB91-20DEF9C7E1C4}
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NatureServe Biotics 2019 |
25
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This community consists of graminoid-dominated vegetation with scattered shrubs, occurring on moderate to high-elevation peaks and saddles in the Southern Blue Ridge. Characteristically, this vegetation is strongly dominated by <i>Danthonia compressa</i>, or in some areas codominated by the subshrub <i>Sibbaldiopsis tridentata</i>. Other characteristic herbaceous species are <i>Angelica triquinata, Carex pensylvanica, Carex debilis, Carex intumescens, Carex brunnescens, Deschampsia flexuosa, Erythronium umbilicatum ssp. monostolum, Gentiana austromontana, Gentianella quinquefolia, Houstonia serpyllifolia, Ionactis linariifolius, Lysimachia quadrifolia, Oclemena acuminata, Potentilla canadensis, Prenanthes roanensis, Smilax herbacea, Solidago bicolor, Solidago glomerata, Stachys clingmanii</i>, and <i>Trautvetteria caroliniensis var. caroliniensis</i>. The floristic composition is a mixture of widespread species, northern disjunct species, such as <i>Agrostis mertensii, Carex siccata, Minuartia groenlandica, Packera schweinitziana</i>, and <i>Sibbaldiopsis tridentata</i>, and Southern Appalachian endemics, such as <i>Erythronium umbilicatum ssp. monostolum, Geum geniculatum, Geum radiatum, Houstonia serpyllifolia, Lilium grayi, Prenanthes roanensis, Solidago glomerata</i>, and <i>Stachys clingmanii</i>). Typical shrubs (which may occur as scattered individuals or as patches) are <i>Rhododendron calendulaceum, Rhododendron catawbiense, Menziesia pilosa, Vaccinium corymbosum</i>, and <i>Rubus canadensis</i>. Species indicative of past grazing include <i>Phleum pratense, Agrostis gigantea, Hieracium scabrum, Rumex acetosella</i>, and <i>Prunella vulgaris</i>. This community occurs on high-elevation (usually above 1350 m [4500 feet]), often south- to southwest-facing domes, ridgetops, and gentle slopes. Strong winds, high rainfall, frequent fog, shallow rocky soils, and extremes of temperature and moisture are characteristic of these environments. It is known from the highest elevations of the southern Appalachian Mountains. It is typically surrounded by dwarfed forests dominated by <i>Fagus grandifolia</i> or <i>Quercus rubra</i>. |
Comm #766
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Morella cerifera - Rosa palustris / Thelypteris palustris var. pubescens Tidal Shrubland » more details
accession code: urn:lsid:vegbank.org:commConcept:33439-{C03C5B4B-C0C6-4EB7-AC1D-38152D954F5A}
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NatureServe Biotics 2019 |
25
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This shrub community occurs along the Atlantic coast of Delaware, Maryland, Virginia and North Carolina in ecotonal sites between tidal marshes and tidal swamps in fresh to oligohaline portions of coastal rivers and embayments. It occupies soupy peats. It is a natural community, but likely has a long-term and complicated successional relationship with other (primarily marsh) communities in the landscape in which it occurs, related to hydrology and fire. <i>Morella cerifera</i> and <i>Rosa palustris</i> are the characteristic dominant species, each attaining 10-25% cover. Also constant but attaining slightly less cover are species such as <i>Acer rubrum</i> and <i>Toxicodendron radicans ssp. radicans</i>. Other woody species include <i>Persea palustris, Magnolia virginiana, Salix caroliniana, Vaccinium formosum, Smilax walteri</i>, and saplings of <i>Fraxinus profunda, Nyssa biflora, Acer rubrum, Pinus taeda, Taxodium distichum</i>, and <i>Liquidambar styraciflua</i>. Herbaceous composition is diverse and varied, with many species "recruited" from adjacent marshes and swamps. <i>Thelypteris palustris var. pubescens</i> is highly characteristic and appears to reach its nodal distribution in this landscape in this community. Other important species can include <i>Osmunda regalis var. spectabilis, Leersia oryzoides, Hibiscus moscheutos, Polygonum arifolium</i>, and <i>Mikania scandens</i>. <i>Murdannia keisak</i> is an aggressive alien weed. |
Comm #767
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Quercus laurifolia - Quercus lyrata / Carpinus caroliniana - Persea palustris / Vaccinium elliottii Riparian Forest » more details
accession code: urn:lsid:vegbank.org:commConcept:33515-{05C5431A-25C9-470A-861B-4012B618BDC4}
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NatureServe Biotics 2019 |
25
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This community type covers forests of low blackwater bottomland river terraces and ridges, in the Atlantic Coastal Plain of the Carolinas. This type may have a somewhat longer hydroperiod than other types in this or other temporarily flooded alliances, but it is not seasonally flooded. It is distinguished from some related types by lacking a significant component of levee species. The canopy is dominated by <i>Quercus laurifolia</i> and <i>Quercus lyrata</i>. The subcanopy characteristically contains <i>Carpinus caroliniana</i> and <i>Persea palustris</i>. One prominent shrub is <i>Vaccinium elliottii</i>. Additional floristic information is needed. Stands of this community have a significant component of <i>Quercus lyrata</i> and generally lack a significant component of <i>Pinus taeda</i>. |
Comm #768
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Panicum virgatum - Spartina patens - Carex silicea Salt Marsh » more details
accession code: urn:lsid:vegbank.org:commConcept:34798-{E0B6D6A6-D4B6-42D8-848A-FD58517BEB60}
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NatureServe Biotics 2019 |
25
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This brackish meadow of the Atlantic coast from New Hampshire to North Carolina occurs at the upland border of high salt marshes. It occurs on freely drained, shallow, sandy peat that is moist from upland seepage and brackish from irregular tidal flooding. Vegetation is dominated by <i>Panicum virgatum</i> and occasionally codominated by <i>Spartina patens</i>. Common associates can include <i>Schoenoplectus americanus, Solidago sempervirens, Teucrium canadense, Distichlis spicata, Carex silicea</i>, and <i>Juncus</i> spp. (<i>Juncus gerardii</i> in the north, <i>Juncus roemerianus</i> in the south). Additional species can include <i>Kosteletzkya virginica, Hibiscus moscheutos, Amaranthus cannabinus</i>, and <i>Typha</i> spp., especially in oligohaline situations. Shrubs may occur sporadically, especially <i>Baccharis halimifolia, Morella pensylvanica, Prunus maritima</i>, and <i>Iva frutescens</i>. Vegetation can be quite diverse and is a mixture of freshwater and brackish species. This association is best developed in salt marshes with a gradual elevation gradient that lends itself to vegetation zonation. The diagnostic species of this association is <i>Panicum virgatum</i> in brackish settings near upland-marsh borders. |
Comm #769
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Scirpus cyperinus Wet Meadow » more details
accession code: urn:lsid:vegbank.org:commConcept:34995-{6977C42E-AAFF-43D9-822B-CF66889FA147}
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NatureServe Biotics 2019 |
25
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This seasonally flooded marsh occurs in the northeastern United States. It is dominated or characterized by <i>Scirpus cyperinus</i>, but composition is variable. Associates include <i>Glyceria</i> spp. and <i>Thelypteris palustris</i>, as well as other species of <i>Scirpus</i>, including <i>Scirpus microcarpus</i> and <i>Scirpus atrovirens</i>. |
Comm #770
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Picea rubens - (Abies fraseri) / (Rhododendron catawbiense, Rhododendron maximum) Forest » more details
accession code: urn:lsid:vegbank.org:commConcept:35434-{14BFC280-1351-4A11-B915-EDF1236843CF}
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NatureServe Biotics 2019 |
25
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This community is restricted to the highest mountain systems of the Southern Appalachians in eastern Tennessee, western North Carolina, and southwestern Virginia. These forests are typically found on moderately steep to steep, convex slopes at elevations between 1550 and 1830 m (5100-6000 feet). This association includes forests of the Southern Appalachians, within the range of <i>Abies fraseri</i>, currently dominated by <i>Picea rubens</i> but showing some evidence of the historical presence of <i>Abies fraseri</i> (either standing dead individuals or ample regeneration), over a shrub stratum dominated by evergreen species, typically <i>Rhododendron catawbiense</i> and <i>Rhododendron maximum</i>. Herb coverage is characteristically low, but on moist north-facing sites, mosses, ferns and forbs may be dense beneath the shrub stratum. |