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Reference
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Description |
Comm #7231
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Fraxinus pennsylvanica - (Juglans nigra, Platanus occidentalis) Forest
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accession code: VB.CC.31060.CEGL006575
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Eastern Ecology Working Group of... |
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This is a green ash - mixed hardwood floodplain forest of the northern Piedmont in the mid-Atlantic eastern United States. It occurs behind levees and on low terraces that are flooded annually for short durations (less than one week per year). Water table is high for the majority of the growing season. Soils are generally silts or clay loams but can have coarser substrates where flood water velocity is higher. The canopy is codominated by <i>Fraxinus pennsylvanica</i> with <i>Juglans nigra</i> and/or <i>Platanus occidentalis</i>. Additional associates include <i>Ulmus americana, Celtis occidentalis, Acer rubrum, Acer saccharinum</i>, and <i>Quercus palustris</i>. In some areas <i>Fraxinus americana</i> may be present in place of <i>Fraxinus pennsylvanica</i>. Subcanopy and shrub layers are sparse and generally comprised of canopy species regeneration plus <i>Carpinus caroliniana, Carya cordiformis, Lindera benzoin, Cornus amomum, Viburnum prunifolium</i>, and <i>Viburnum dentatum</i>. The invasive shrubs <i>Rosa multiflora, Lonicera morrowii, Berberis thunbergii</i>, and <i>Lonicera japonica</i> can be problematic. Herbaceous species, where exotics are not rampant, can include <i>Impatiens pallida, Impatiens capensis, Laportea canadensis, Verbesina alternifolia, Thalictrum pubescens, Hydrophyllum canadense, Podophyllum peltatum, Symplocarpus foetidus, Circaea lutetiana, Boehmeria cylindrica, Onoclea sensibilis, Arisaema triphyllum</i>, and <i>Viola</i> spp. Woody vines include <i>Toxicodendron radicans</i> and <i>Parthenocissus quinquefolia</i>. Exotic species tend to dominate the herb layer, including <i>Alliaria petiolata, Glechoma hederacea</i>, and <i>Microstegium vimineum</i>. Diagnostic features of this floodplain forest include the presence of <i>Juglans nigra</i> and rich herbs. |
Comm #7232
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Acer rubrum - Fraxinus pennsylvanica / Saururus cernuus Forest
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accession code: VB.CC.37518.CEGL006606
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Fleming, G. P., and K. D. Patter... |
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This red maple swamp community of the Mid-Atlantic Coastal Plain of the Chesapeake Bay and Piedmont regions occurs on poorly drained to very poorly drained soils on flats and along watercourses that are seasonally to semipermanently flooded. The organic horizon is of variable depth and overlies sandy or silt clay loam soils. This swamp has pronounced hummock-and-hollow microtopography. The tree canopy is closed to partially open and dominated by <i>Acer rubrum</i> and <i>Fraxinus pennsylvanica</i>. Other canopy associates may include <i>Nyssa sylvatica, Liquidambar styraciflua, Ulmus americana, Quercus lyrata, Quercus phellos, Quercus lyrata</i>, and <i>Populus heterophylla</i>. The shrub layer includes <i>Lindera benzoin, Leucothoe racemosa, Ilex verticillata, Viburnum</i> spp., and <i>Fraxinus pennsylvanica</i> saplings. The herb layer is characterized by <i>Saururus cernuus, Peltandra virginica, Boehmeria cylindrica, Triadenum walteri, Cinna arundinacea, Pilea pumila, Impatiens capensis, Osmunda regalis, Leersia oryzoides, Leersia virginica, Glyceria striata, Commelina virginica, Rumex verticillatus, Carex</i> spp., and <i>Polygonum arifolium</i>. |
Comm #7233
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Abies lasiocarpa / Saxifraga bronchialis Scree Woodland
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accession code: VB.CC.21372.ABIESLASIOCARPA
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Western Ecology Working Group of... |
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Comm #7234
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Eragrostis hypnoides - Ludwigia sphaerocarpa - Polygonum hydropiperoides Herbaceous Vegetation
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accession code: VB.CC.31364.CEGL006608
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Eastern Ecology Working Group of... |
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This seasonally flooded, depressional wetland of the central Atlantic Coastal Plain occupies the lowest portion of the basin and is flooded for the longest period relative to adjacent vegetation zones. In years of high rainfall resulting in incomplete drawdown, many species of this association persist in the seedbank below standing water. The substrate is an organic layer over black clay loam. The vegetation is dominated by small-statured herbs, including <i>Eragrostis hypnoides, Hottonia inflata, Polygonum hydropiperoides, Polygonum amphibium, Ludwigia sphaerocarpa, Oldenlandia uniflora, Cyperus strigosus, Bidens frondosa, Bidens discoidea, Fimbristylis perpusilla, Fimbristylis autumnalis</i>, and <i>Juncus pelocarpus</i>. Other species of taller stature may be present, including seedlings or small saplings of <i>Cephalanthus occidentalis</i> and herbaceous species <i>Panicum rigidulum, Carex striata, Carex gigantea</i>, and <i>Torreyochloa</i> sp. |
Comm #7235
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Intertidal Mudflats Sparse Vegetation
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accession code: VB.CC.37512.CEGL006614
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Welsh, B. L. 1980. Comparative n... |
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This is a saline (>18.0 ppt) intertidal mudflat community that typically lacks vegetation. <i>Ulva lactuca</i> (sea-lettuce) may be present or prominent. The substrate consists of silt or sand that is rich in organic matter and poorly-drained at low tide. These saline intertidal mudflats extend along the North Atlantic Coast from Maine to New York. |
Comm #7236
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Panicum virgatum - (Andropogon virginicus) Herbaceous Vegetation
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accession code: VB.CC.30953.CEGL006616
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Eastern Ecology Working Group of... |
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This herbaceous community is found on dry sandy soils in abandoned agricultural fields and along roadsides from coastal Massachusetts to Maryland. Diagnostic features include the dominance of <i>Panicum virgatum</i> in an upland environmental setting. <i>Panicum virgatum</i> is the dominant species, but <i>Andropogon virginicus</i> may be codominant. Other species may include <i>Conyza canadensis, Tridens flavus, Rhexia mariana, Juncus tenuis, Helenium autumnale, Ageratina altissima (= Eupatorium rugosum), Sorghastrum nutans</i>, and <i>Dichanthelium clandestinum (= Panicum clandestinum)</i>. <i>Solidago rugosa, Rumex acetosella</i>, and <i>Anthoxanthum odoratum</i> are associates documented from Massachusetts. Scattered shrubs including <i>Morella pensylvanica</i> are often present. |
Comm #7237
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Maritime Erosional Bluffs and Cliffs Sparse Vegetation
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accession code: VB.CC.30937.CEGL006618
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Eastern Ecology Working Group of... |
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This community includes steep erosional cliffs with sparse vegetation occurring on the North Atlantic Coast. The coarse sand and gravel substrate is unconsolidated. This community is currently described for Boston Harbor Islands National Recreation Area, but is known to occur on Block Island, Rhode Island, and other Massachusetts islands including Martha's Vineyard and Nomans Land Island. |
Comm #7238
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CEGL008665
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accession code: VB.CC.7957.CEGL008665
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EcoArt 2002 |
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Comm #7239
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Bouteloua gracilis - Eragrostis intermedia Herbaceous Vegetation
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accession code: VB.CC.24794.BOUTELOUAGRACIL
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Western Ecology Working Group of... |
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Comm #7240
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CEGL005087
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accession code: VB.CC.6451.CEGL005087
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
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