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Name
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Reference
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Plots↓
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Description |
Comm #3411
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Podostemum ceratophyllum Aquatic Vegetation
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accession code: urn:lsid:vegbank.org:commConcept:33161-{FEB5D98F-9BEC-4E44-B3BB-5B894F4CA2B7}
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NatureServe Biotics 2019 |
2
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This community is wide-ranging, occurring in rivers throughout the eastern and southeastern United States. It represents essentially monospecific beds of <i>Podostemum ceratophyllum</i>, although some algae may also be present. This submersed vegetation forms a low mat or crust attached to rocks in moderately fast- to fast-flowing water. Typical habitat for this association in the Central Appalachians and related areas includes rocky surfaces of streambeds and riverbeds in mature drainage systems where the streams have cut down to rock and the floodplain is relatively narrow, or on dams. It tends to be associated with higher pH streams which cut through diabase, limestone or calcareous shales. |
Comm #3412
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Salix drummondiana / Carex aquatilis Shrubland
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accession code: VB.CC.29402.SALIXDRUMMONDIA
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Carsey et al 2003b |
2
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The Salix drummondiana/Carex aquatilis (Drummond willow/water sedge) plant association forms a narrow band of tall (5-8 feet, 1.5-2.5 m) willows lining steep to moderately steep streams in the montane zone of the Rocky Mountains. The dominance of Carex aquatilis (water sedge) in the undergrowth is an indication of a wet, stable site. This association represents one of the wettest types within the Salix drummondiana Alliance. |
Comm #3413
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PHRAGMITES AUSTRALIS SEMIPERMINENTLY FLOODED HERBACEOUS ALLIANCE
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accession code: VB.cc.30521.PHRAGMITESAUSTR
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NVC 2004 |
2
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Comm #3414
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Lasallia papulosa - Lasallia caroliniana Nonvascular Vegetation
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accession code: urn:lsid:vegbank.org:commConcept:33177-{A7271F0A-198B-4409-8DCB-45B8087ED5CE}
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NatureServe Biotics 2019 |
2
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This association is known from the steeply sloping exfoliation dome faces on Grandfather Mountain, North Carolina, and probably at Roan Mountain, Tennessee and North Carolina. As defined, this association and its alliance are intended to cover vertical cliffs and sometimes more gently sloping large outcrops (often as large as 1 hectare) which have extremely few or no vascular plants and are relatively dry. In the Southern Appalachians, these generally occur because of a combination of outcrop geometry (few or no suitable crevices, as in exfoliation domes) and hydrology (inadequate seepage moisture to support vascular plants). A few crevice vascular plants are allowed. Moister cliffs without crevices support ~<i>Umbilicaria mammulata</i> Cliff Vegetation (CEGL004387)$$. |
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Salix exigua Association
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accession code:
NOT CURRENTLY ACCEPTED
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MCV2 |
2
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Comm #3415
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Umbilicaria mammulata Cliff Vegetation
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accession code: urn:lsid:vegbank.org:commConcept:33178-{23C7B2BE-2EB0-4065-8AAA-019A5E6D071E}
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NatureServe Biotics 2019 |
2
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Vegetation is strongly dominated by <i>Umbilicaria mammulata</i>, on relatively moist, shaded rock outcrops, often on slopes with northerly aspects. This vegetation occurs where periodic seepage occurs on acidic rock outcrops. Individual occurrences can be as large as an acre. Vascular plants are generally sparse or absent, though trees or shrubs of adjacent forest communities often shade the outcrop community for much of the day. Other umbilicate lichens, shade-tolerant foliose lichens such as <i>Flavoparmelia baltimorensis</i>, and numerous crustose lichens may also occur. Associates include scattered individuals of <i>Dryopteris intermedia</i> and <i>Polypodium appalachianum</i>. |
Comm #3416
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Buttonbush wetland
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accession code: urn:lsid:ecoobs.vegbank.org:commConcept:17495-{7037D8D8-F777-47DA-A70B-A9D81CFAC6D6}
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Zimmerman et al. 2012 |
2
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Comm #3417
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Nyssa sylvatica - Magnolia virginiana - (Pinus rigida) / Rhododendron viscosum - Toxicodendron vernix / Smilax pseudochina Woodland
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accession code: VB.CC.37283.CEGL006219
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2
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This saturated woodland is known from a limited area at and just east of the Fall-line in Maryland and northern Virginia. It occurs on saturated toeslopes at bases of highly weathered, highly acidic, fluvial-estuarine terrace gravel deposits of Cretaceous or Tertiary age. Irregular microtopography with abundant groundwater seepage forming braided channels, <i>Sphagnum</i>-covered hummocks, and mucky depressions is characteristic. Historic accounts of this vegetation describe these areas as "bogs" with <i>Magnolia virginiana</i> and various shrubs fringing and forming clumps within a more open center dominated by herbaceous plants. Historic vegetation included <i>Nyssa sylvatica, Toxicodendron vernix</i> (abundant), <i>Gaylussacia frondosa</i> (abundant), <i>Viburnum nudum var. nudum, Pinus rigida</i>, and <i>Eriocaulon decangulare</i> (abundant), <i>Lycopodiella appressa, Carex bullata, Asclepias rubra, Helianthus angustifolius, Rhynchospora gracilenta, Xyris torta, Pogonia ophioglossoides</i>, and <i>Utricularia</i> spp. Today, remaining examples exist mostly as open woodlands with very dense shrubs (averaging 80% cover) and very small, scattered herbaceous patches. <i>Nyssa sylvatica</i> is the most dominant species, followed by <i>Magnolia virginiana, Acer rubrum, Liriodendron tulipifera</i>, and <i>Ilex opaca var. opaca</i>. <i>Pinus rigida</i> occurs in about half the plots, sometimes with significant cover. Shrub cover includes <i>Rhododendron viscosum, Vaccinium corymbosum, Smilax rotundifolia, Gaylussacia frondosa, Viburnum nudum var. nudum, Leucothoe racemosa, Photinia pyrifolia (= Aronia arbutifolia), Ilex verticillata, Amelanchier canadensis, Ilex laevigata</i>, and <i>Toxicodendron vernix</i>. The only herbs that have significant cover are <i>Osmunda cinnamomea</i> and <i>Dichanthelium dichotomum var. dichotomum</i>, while many others have low cover. Regionally uncommon or rare "bog" species persisting at one or a few sites include <i>Solidago uliginosa var. uliginosa, Eurybia radula (= Aster radula), Eriocaulon decangulare, Juncus longii, Drosera intermedia, Asclepias rubra</i>, and <i>Kalmia angustifolia</i>. Historically, fire may have been an important factor maintaining herbaceous patches and limiting the growth of shrubs and trees, but dynamics of this community type are not fully understood. This community has always had a limited distribution in the Mid-Atlantic fall-line zone and has probably always been rare. Today, less than 10 sites remain in very small patches degraded by fire exclusion, woody succession, and various anthropogenic impacts. This community has similarities with the bog vegetation of the New Jersey Pine Barren region but is likely distinguished by species with southern affinities. |
Comm #3418
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Aristida purpurea - Gutierrezia sarothrae Shrub Herbaceous Alliance
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accession code: VB.cc.29836.ARISTIDAPURPURE
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NVC 2004 |
2
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Comm #3419
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Engelmann Spruce Sparsely Vegetated Alliance
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accession code: VB.cc.30021.ENGELMANNSPRUCE
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NVC 2004 |
2
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