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Name
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Reference
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Plots↓
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Description |
Comm #281
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Liquidambar styraciflua - Acer rubrum - Quercus phellos / Eubotrys racemosa Swamp Forest
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accession code: urn:lsid:vegbank.org:commConcept:34758-{8A4EC7A5-CD14-42B0-AA04-F1721EB2D919}
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NatureServe Biotics 2019 |
62
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This association is a seasonally flooded forest of shallow basins and other depressions of the Coastal Plain of the Chesapeake Bay region. The substrate is characterized by mineral soils, generally acidic, gleyed to mottled, sandy or clay loams. Characteristic tree species include <i>Acer rubrum, Liquidambar styraciflua</i>, and <i>Nyssa sylvatica</i>, which are nearly constant in the canopy. Associates include <i>Ilex opaca, Magnolia virginiana, Nyssa biflora, Sassafras albidum, Quercus palustris, Pinus taeda</i>, and <i>Quercus phellos</i>, and occasionally <i>Quercus falcata, Quercus lyrata</i>, or <i>Betula nigra</i>. The shrub layer is characterized by <i>Eubotrys racemosa, Vaccinium corymbosum, Clethra alnifolia, Lindera benzoin, Ilex verticillata</i>, and <i>Rhododendron viscosum</i>. <i>Smilax rotundifolia</i> is a particularly characteristic vine. The herbaceous layer is generally sparse but may include <i>Mitchella repens, Osmunda cinnamomea, Chasmanthium laxum, Woodwardia areolata, Onoclea sensibilis, Osmunda regalis, Carex albolutescens, Carex debilis var. debilis, Scirpus cyperinus, Juncus effusus</i>, and <i>Polygonum</i> spp. <i>Carex joorii</i> is inconstant but locally abundant in some stands in the southern part of the range. |
Comm #282
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Eriophorum virginicum - (Carex folliculata) / Sphagnum spp. - Polytrichum spp. Fen
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accession code: urn:lsid:vegbank.org:commConcept:35195-{624CE1D0-DE62-4F65-A5EB-3D6AA0DB8B4E}
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NatureServe Biotics 2019 |
62
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This acidic herbaceous community occurs on temporarily flooded, semipermanently flooded, or saturated peat in the Allegheny Mountains region of West Virginia and Maryland, at elevations between 770 and 1210 m. It is a small-patch type that occupies flat-lying land (0-1° slopes) in headwater basins. Older stands typically occur over shallow bedrock, where they are kept open by high water tables. Younger stands often occur in beaver-influenced wetland mosaics, often behind breached dams on the site of former beaver ponds. The type also occurs as a successional community on formerly forested peatlands that have been logged and/or burned within the last century. Hummock-and-hollow microtopography is moderately well-developed, with hummocks ranging from 10-30 cm in height. Bedrock is typically acidic sandstone and, less commonly, shale or limestone. The substrate is poorly to very poorly drained peat or muck. Peat deposits are shallow, ranging from 10-75 cm in depth, underlain by clay-rich soils or bedrock. Mean soil pH is 3.8. Low cover of stunted trees, shrubs, and snags may occupy hummock tops, typically including <i>Picea rubens, Amelanchier laevis, Rhododendron maximum, Hypericum densiflorum, Viburnum nudum var. cassinoides, Photinia pyrifolia, Photinia melanocarpa, Vaccinium myrtilloides, Kalmia latifolia</i>, and <i>Ilex verticillata</i>. The dwarf-shrub <i>Rubus hispidus</i> has high cover and constancy in this type. The dwarf-shrubs <i>Vaccinium oxycoccos</i> and <i>Vaccinium macrocarpon</i> are often present with low cover. The herbaceous layer is dominated by <i>Eriophorum virginicum, Solidago uliginosa, Carex folliculata</i>, and <i>Juncus effusus</i>. Other common herbaceous species include <i>Juncus brevicaudatus, Osmunda cinnamomea var. cinnamomea, Carex trisperma var. trisperma, Drosera rotundifolia var. rotundifolia, Scirpus cyperinus, Gentiana linearis, Rhynchospora alba, Carex stipata, Agrostis hyemalis</i>, and <i>Agrostis perennans</i>. Nonvascular plants are dominated by <i>Sphagnum</i> spp. (<i>Sphagnum recurvum, Sphagnum magellanicum, Sphagnum fallax</i>, and others) and generally include moderate cover by <i>Polytrichum</i> spp. (<i>Polytrichum commune, Polytrichum strictum</i>). Mean species richness of all vascular plants and any nonvascular plants with cover >1% is 20 taxa per 400 m2 for 39 plots in West Virginia and Maryland. |
Comm #283
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Pinus palustris / Quercus (laevis, myrtifolia) / Aristida beyrichiana - Chapmannia floridana Woodland
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accession code: urn:lsid:vegbank.org:commConcept:36621-{7AA8F9B3-86DD-4F4C-BC54-C4202A6E11B3}
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NatureServe Biotics 2019 |
62
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Comm #284
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Hemlock (white pine) -northern hardwood forest
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accession code: urn:lsid:ecoobs.vegbank.org:commConcept:17527-{FB120960-4E18-4F36-8787-1773966FF6F4}
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Zimmerman et al. 2012 |
62
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Comm #285
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VACCINIUM DELICIOSUM ALLIANCE
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accession code: VB.CC.12891.VACCINIUMDELICI
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Jennings 2003. Vegetation alliances: composition and function. |
61
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Comm #286
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Pinus strobus - Tsuga canadensis / Rhododendron maximum - (Leucothoe fontanesiana) Forest
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accession code: urn:lsid:vegbank.org:commConcept:35414-{D9ADBB26-036D-44BA-BBF6-1446D9386E0B}
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NatureServe Biotics 2019 |
61
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This community occurs on creek and river margins and on lower or protected slopes. This association occurs in the Southern Blue Ridge and extends into adjacent ecoregions, such as the Cumberlands of Kentucky and Tennessee. This forest vegetation has a canopy dominated by <i>Pinus strobus</i>, sometimes codominating with <i>Tsuga canadensis</i>, occurring over a shrub stratum dominated by <i>Rhododendron maximum</i>. This is an evergreen forest, but deciduous trees may form a minor part of the canopy. Other minor canopy species may include <i>Liriodendron tulipifera, Betula lenta, Magnolia fraseri</i> (within its range), <i>Acer rubrum</i>, and <i>Tilia americana var. heterophylla</i>. Other shrub species may include <i>Kalmia latifolia, Leucothoe fontanesiana, Lindera benzoin</i>, and <i>Ilex opaca var. opaca</i>. Herbaceous cover is typically sparse. The Kentucky examples lack <i>Leucothoe fontanesiana</i> and have <i>Magnolia macrophylla</i> rather than <i>Magnolia fraseri</i>. Large stems of <i>Smilax rotundifolia</i> may be present in stands of this vegetation. |
Comm #287
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Cercocarpus montanus var. glaber Association
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accession code: urn:lsid:vegtwig.vegbank.org:commconcept:487-{FA5AA8FE-5742-471B-A82D-4452F2F65829}
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MCV2 |
61
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76.100.03 |
Comm #288
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Dry oak-mixed hardwood forest
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accession code: urn:lsid:ecoobs.vegbank.org:commConcept:17504-{CDE2C1C4-4F2D-4724-B5BC-B7D68F367657}
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Zimmerman et al. 2012 |
61
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Comm #289
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Platanus occidentalis - Acer negundo - Juglans nigra / Asimina triloba / Mertensia virginica Forest
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accession code: VB.CC.37284.CEGL004073
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60
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This association occupies the higher elevations of floodplains, floodplain berms, and low terraces of major Mid-Atlantic rivers (e.g., Potomac, Shenandoah, Monocacy, James) and as the main floodplain vegetation on medium-sized rivers draining areas of nutrient-rich substrates (e.g., Antietam Creek, Bull Run). Soil texture is variable, ranging from silty-clay loams to loams over much of the range, and samples collected from plots had high base status. This vegetation type is a closed forest with mixed overstory dominance by <i>Platanus occidentalis, Juglans nigra, Carya cordiformis, Celtis occidentalis, Ulmus americana</i>, and, locally, <i>Fraxinus pennsylvanica, Liriodendron tulipifera</i>, and <i>Quercus shumardii</i>. <i>Acer saccharinum</i> is codominant in a minority of stands but absent or unimportant in many others. <i>Acer negundo</i> is strongly dominant in the subcanopy. <i>Asimina triloba</i> and/or <i>Lindera benzoin</i> dominate a moderately dense to dense shrub layer. The herb layer is rich in spring ephemerals and other nutrient-demanding species, including <i>Mertensia virginica, Asarum canadense, Chaerophyllum procumbens, Hydrophyllum canadense, Viola striata, Phlox divaricata, Podophyllum peltatum, Erythronium americanum, Dicentra canadensis, Sanicula odorata, Packera aurea (= Senecio aureus), Claytonia virginica, Festuca subverticillata, Carex jamesii, Carex grisea, Floerkea proserpinacoides, Osmorhiza longistylis</i>, and <i>Ranunculus abortivus</i>. Invasive exotics, especially <i>Alliaria petiolata, Veronica hederifolia, Duchesnea indica, Urtica dioica ssp. dioica, Microstegium vimineum</i>, and <i>Glechoma hederacea</i>, are usually abundant. |
Comm #290
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BARE GROUND
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accession code: VB.cc.29896.BAREGROUND
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NVC 2004 |
60
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