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Reference
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Description |
Comm #261
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Quercus rubra - Acer saccharum - Liriodendron tulipifera Forest » more details
accession code: urn:lsid:vegbank.org:commConcept:34773-{79581590-6EE3-410F-B4A0-9D4B7BF4B996}
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NatureServe Biotics 2019 |
66
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This red oak - sugar maple community is found primarily in the Allegheny Plateau and Appalachian Mountains of the United States, as well as on the northern Piedmont north to the Hudson Valley, with possible extensions east and west of those areas. It is typically found in coves, on moist north- and east-facing slopes and on well-drained flats. Soils are slightly acidic and of intermediate fertility. The closed-canopy tree layer is dominated by a mixture of oaks, primarily <i>Quercus alba</i> and <i>Quercus rubra</i>, with other hardwoods including <i>Acer saccharum, Acer rubrum</i>, and <i>Liriodendron tulipifera</i>. <i>Carya ovata, Carya tomentosa, Nyssa sylvatica</i>, and <i>Quercus velutina</i> are possible associates. <i>Carya</i> spp. may share dominance in some stands. Dominance by <i>Acer rubrum</i> or <i>Liriodendron</i> may indicate a past disturbance history. A wide variety of more mesic associates, such as <i>Betula alleghaniensis, Betula lenta, Fagus grandifolia, Fraxinus americana</i>, and <i>Tilia americana</i> could occur but are negligible in dominance. In addition to <i>Acer saccharum</i> reproduction, some understory species may include <i>Carpinus caroliniana, Cercis canadensis, Cornus florida</i>, and <i>Ostrya virginiana</i>. Shrub and vine species include <i>Amelanchier laevis, Amelanchier arborea, Cornus</i> spp., <i>Hamamelis virginiana, Lindera benzoin, Viburnum acerifolium, Viburnum recognitum</i>, and <i>Vitis riparia</i>. Ericaceous shrubs, such as <i>Kalmia latifolia, Vaccinium angustifolium</i> and <i>Vaccinium pallidum</i>, may also be present but are not abundant. The ground layer species are highly variable but include <i>Caulophyllum thalictroides, Ageratina altissima, Dennstaedtia punctilobula, Podophyllum peltatum, Maianthemum racemosum, Medeola virginiana, Thelypteris noveboracensis, Dryopteris marginalis, Dryopteris intermedia, Actaea</i> spp., and <i>Uvularia sessilifolia</i>. Exotic species, including <i>Rosa multiflora</i> and <i>Alliaria petiolata</i>, may be present in the shrub and herb layers of disturbed stands. |
Comm #262
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Peltandra virginica - Pontederia cordata Tidal Herbaceous Vegetation » more details
accession code: VB.CC.37248.CEGL004706
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65
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This community is codominated by leafy forbs <i>Peltandra virginica</i> and <i>Pontederia cordata</i>. Associated species can include <i>Zizania aquatica, Sagittaria latifolia, Acorus americanus, Polygonum arifolium, Polygonum hydropiperoides, Polygonum sagittatum</i>, and <i>Bidens</i> spp. Species occurring less frequently can include <i>Typha</i> spp. and <i>Impatiens capensis</i>. At the southern end of the range in Virginia, there is a well-marked variant in which <i>Nuphar advena (= Nuphar lutea ssp. advena)</i> is codominant with <i>Peltandra virginica</i> and <i>Pontederia cordata</i> in variable mixtures. This variant differs from the almost monospecific ~<i>Nuphar advena</i> Tidal Herbaceous Vegetation (CEGL004472)$$ in that it occurs on slightly higher landscape positions where the duration of inundation is shorter, supports higher mean species richness, and contains a number of taxa absent from the low intertidal portions of mudflats. |
Comm #263
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XEROPHYLLUM TENAX ALLIANCE » more details
accession code: VB.CC.8260.XEROPHYLLUMTENA
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Jennings 2003. Vegetation alliances: composition and function. |
65
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Comm #264
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Carex torta - Apocynum cannabinum - Cyperus spp. Riverbed Vegetation » more details
accession code: urn:lsid:vegbank.org:commConcept:35165-{175ACECD-6B7C-412E-B6D6-0EB9FC632B41}
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NatureServe Biotics 2019 |
65
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This herbaceous vegetation is found from New England south through New York and Pennsylvania and occurs on large coarse substrates deposited along medium- to high-energy river channels and, less frequently, exposed lakeshores with heavy wave action. Seasonal flooding and ice-scour maintain the open nature of these communities; generally, they develop in areas of the active channel that are exposed at low water or in drought years. Vegetation can be sparse to dense depending on degree of flooding and length of exposure. Characteristic perennial species that tolerate inundation and flood scouring include <i>Carex torta</i> and low <i>Salix</i> spp. Associated species tend to vary widely from site to site, can be diverse, and may be sparse; they include <i>Apocynum cannabinum, Verbena hastata, Symphyotrichum puniceum, Doellingeria umbellata, Solidago rugosa, Solidago canadensis, Solidago gigantea, Calamagrostis canadensis, Phalaris arundinacea, Scirpus expansus, Scirpus cyperinus, Thelypteris palustris, Scutellaria lateriflora, Agrostis stolonifera, Dichanthelium clandestinum, Eutrochium maculatum, Eupatorium perfoliatum, Elymus riparius, Cyperus strigosus</i> and other <i>Cyperus</i> spp., <i>Eleocharis</i> spp., <i>Lobelia cardinalis, Onoclea sensibilis, Viola</i> spp., <i>Clematis virginiana, Polygonum amphibium, Polygonum hydropiper, Polygonum pensylvanicum, Polygonum sagittatum, Polygonum persicaria, Polygonum punctatum, Polygonum lapathifolium, Schizachyrium scoparium, Andropogon gerardii</i>, and occasionally <i>Sanguisorba canadensis</i>. Battered and stunted shrubs and trees can occur, including <i>Salix sericea, Salix eriocephala, Cornus amomum, Betula nigra, Populus deltoides</i>, and <i>Platanus occidentalis</i>. Nonvascular plants can be sparse, but where present can include <i>Bryum</i> spp. Invasive, exotic species can be problematic in these areas, especially <i>Tussilago farfara, Lythrum salicaria, Polygonum cuspidatum, Polygonum persicaria</i>, and in the southern portion of the range <i>Microstegium vimineum</i>. |
Comm #265
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Periodically Exposed Shoreline Community » more details
accession code: urn:lsid:vegbank.org/ecoObs:commConcept:17547-{B19CAAB6-92EC-44D6-BF11-BF2294584211}
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Zimmerman et al. 2012 |
65
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Comm #266
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Ephedra cutleri Shrub Herbaceous Alliance » more details
accession code: VB.cc.30026.EPHEDRACUTLERIS
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NVC 2004 |
64
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Comm #267
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Malosma laurina Shrubland » more details
accession code: VB.CC.37461.CEGL003696
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64
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This shrubland association occurs on gentle to very steep southeast- to northwest-facing slopes at low elevations between 0 and 528 m. It is characterized by a dominance of <i>Malosma laurina</i> in the shrub layer and a relatively nondescript herbaceous layer. The emergent tree layer includes <i>Quercus agrifolia</i> in about 20% of the stands. |
Comm #268
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Mountain Snowberry Shrubland Alliance » more details
accession code: VB.cc.30471.MOUNTAINSNOWBER
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NVC 2004 |
64
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Comm #269
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Tsuga canadensis / Rhododendron maximum - (Clethra acuminata, Leucothoe fontanesiana) Forest » more details
accession code: urn:lsid:vegbank.org:commConcept:35440-{E13F1F67-AC53-4BFB-9B09-F62462E5D5D7}
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NatureServe Biotics 2019 |
64
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These are forests of lower or protected slopes and terraces with <i>Tsuga canadensis</i> occurring over a dense to patchy shrub stratum of <i>Rhododendron maximum</i>. In the southern Appalachians, this forest occurs at elevations greater than 550 m (1800 feet). In Kentucky, disturbed areas may have abundant <i>Betula lenta</i> and <i>Betula alleghaniensis</i> in the subcanopy. Other canopy species of minor importance may include <i>Liriodendron tulipifera, Tilia americana var. heterophylla, Pinus strobus, Betula lenta, Magnolia fraseri, Acer rubrum</i>, and <i>Fraxinus americana</i>; these would total less than 25% of the canopy cover. In the Southern Blue Ridge, <i>Leucothoe fontanesiana</i> is often a shrub component and sometimes occurs densely. Other typical shrubs can include <i>Ilex opaca, Clethra acuminata</i>, and <i>Kalmia latifolia</i>. Herbs are sparse to moderate, depending on the shrub cover. Typical herbs include <i>Chimaphila maculata, Goodyera pubescens, Medeola virginiana, Hexastylis shuttleworthii, Mitchella repens, Polystichum acrostichoides, Viola blanda</i>, and <i>Galax urceolata</i>. Bryophyte cover is often dense. Stands in the southern Cumberlands of Kentucky and Tennessee would lack <i>Leucothoe fontanesiana</i>; instead, <i>Clethra acuminata</i> is a characteristic shrub of these stands. |
Comm #270
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Fagus grandifolia - Quercus rubra / Cornus florida / Polystichum acrostichoides - Hexastylis virginica Forest » more details
accession code: urn:lsid:vegbank.org:commConcept:36526-{F1022874-9F01-4D61-9C59-9045FB3AC970}
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NatureServe Biotics 2019 |
64
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This association represents the more typical mesic mixed hardwood forest of the Piedmont from North Carolina to Georgia. The canopy of stands of this association is dominated by mesophytic trees such as <i>Fagus grandifolia, Quercus rubra, Liriodendron tulipifera, Acer rubrum</i>, and in the western Piedmont, <i>Tsuga canadensis</i>. Typical understory trees include <i>Cornus florida, Oxydendrum arboreum, Acer rubrum</i>, and <i>Ilex opaca</i>. Shrub species may include <i>Vaccinium stamineum, Viburnum rafinesqueanum, Euonymus americanus</i>, and sometimes <i>Kalmia latifolia</i>. The herb layer is often moderately dense and diverse, though it may be sparse under heavy shade. Herb species may include <i>Polystichum acrostichoides, Viola</i> spp., <i>Dichanthelium</i> spp., <i>Galium circaezans, Hexastylis arifolia, Hexastylis minor, Desmodium nudiflorum, Erythronium umbilicatum ssp. umbilicatum, Chamaelirium luteum, Epifagus virginiana, Tiarella cordifolia var. collina, Heuchera americana, Stellaria pubera, Podophyllum peltatum, Prenanthes serpentaria, Thalictrum thalictroides, Chrysogonum virginianum var. virginianum, Hepatica nobilis var. obtusa, Thelypteris noveboracensis</i>, and <i>Botrychium virginianum</i>. Exact composition varies locally with position on slope and nature of soil. Western Piedmont sites often have increasing importance of <i>Tsuga canadensis, Rhododendron</i> spp., and other species that are more typical of the Southern Blue Ridge. |