Comm #5694
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Alnus rubra / Rubus spectabilis / Carex obnupta - Lysichiton americanus Forest
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accession code: VB.CC.34225.CEGL003389
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Western Ecology Working Group of... |
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According to Christy (2004), habitat for this association is forested wetland (swamp). Some sites are silted-in beaver ponds, and others are in peatlands where the association occurs in nutrient-rich laggs adjacent to uplands. Stands along streams may be flooded for brief periods after winter storms. Stands are dominated by <i>Alnus rubra</i> between 20-50 years old and have relatively few species in the shrub and herb layers. <i>Thuja plicata, Picea sitchensis</i>, and <i>Tsuga heterophylla</i> are sparsely represented in both mature and reproducing layers, where they are peripheral or limited to elevated microsites. The scanty shrub layer may include <i>Rubus ursinus, Salix hookeriana, Spiraea douglasii, Lonicera involucrata</i>, or <i>Rubus spectabilis</i> in wet areas and may have <i>Gaultheria shallon</i> and <i>Acer circinatum</i> on stumps and logs. The herb layer is dominated by <i>Carex obnupta</i> and <i>Lysichiton americanus</i>. <i>Athyrium filix-femina</i> has a constancy of 23%, but cover never exceeds 10%. <i>Polystichum munitum</i> may be abundant on logs and stumps. Expanses of treacherously deep muck frequently occur between clumps of <i>Carex</i> and <i>Lysichiton</i>. <i>Sphagnum</i> does not occur in this association but <i>Eurhynchium praelongum</i> is common. |
Comm #5696
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Pinus monticola / Deschampsia caespitosa Forest
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accession code: VB.CC.32809.CEGL003441
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Western Ecology Working Group of... |
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This is an extremely rare floodplain forest from central Oregon. It is known from only one site in the upper parts of the John Day River watershed. The elevation is about 1525 m (5000 feet), in the grand fir zone. It is a floodplain community, found in a broad and shallow, slightly sinuous river valley, in a narrow, V-shaped valley with moderate gradient (over 2%). Fire and flooding disturbance help maintain <i>Pinus monticola</i> as the primary canopy dominant. <i>Pinus monticola</i> is the sole canopy dominant. <i>Abies grandis</i> and <i>Pinus monticola</i> are both present as understory trees. <i>Mahonia repens</i> was the only shrub found, at very low cover. Grasses dominate the understory, with <i>Deschampsia caespitosa</i> (13% cover) and <i>Elymus glaucus</i> (10% cover) being codominant, and <i>Carex geyeri</i> also present. Forbs included <i>Achillea millefolium, Adiantum pedatum</i>, and <i>Orthilia secunda (= Pyrola secunda)</i>. |
Comm #5697
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Pinus glabra - Quercus laurifolia / Crataegus opaca / Sabal minor Forest
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accession code: VB.CC.21016.PINUSGLABRAQUER
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Southeastern Ecology Working Gro... |
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This community occurs on hydric, acidic silt loams (Encrow, Gilbert, and Springfield series), on broad, low flats, in small to large depressional areas, and along small, intermittent, ill-defined drainages ('slashes'), on the Pleistocene prairie terraces in the southwestern portion of the Florida parishes of southeastern Louisiana. Characteristic canopy trees include Pinus glabra, Quercus laurifolia, Quercus phellos, Quercus michauxii, Quercus nigra, Quercus pagoda, Quercus virginiana, Pinus taeda, Nyssa biflora, Nyssa sylvatica, Magnolia grandiflora, Salix nigra, Liquidambar styraciflua, Carya glabra, Acer rubrum, and Fraxinus pennsylvanica. Understory trees and shrubs include Crataegus opaca and Sabal minor (often very abundant or dominant), Arundinaria gigantea ssp. tecta, Cephalanthus occidentalis, Diospyros virginiana, Cornus foemina, Crataegus viridis, Ilex opaca var. opaca, Ilex decidua, Itea virginica, Morella cerifera (= Myrica cerifera), Sambucus canadensis, Styrax americanus, and Viburnum dentatum. Woody vines include Ampelopsis arborea, Berchemia scandens, Brunnichia ovata, Campsis radicans, Toxicodendron radicans ssp. radicans, Smilax glauca, Smilax rotundifolia, and Vitis rotundifolia. Herbs include Boehmeria cylindrica, Carex spp., Chasmanthium latifolium, Chasmanthium laxum, Chasmanthium sessiliflorum, Cyperus spp., Gratiola virginiana, Hygrophila lacustris, Juncus spp., Justicia ovata, Ludwigia spp., Lycopus rubellus, Lycopus virginicus, Lysimachia radicans, Onoclea sensibilis, Osmunda regalis var. spectabilis, Phanopyrum gymnocarpon, Polygonum spp., Rhynchospora spp., Sabatia calycina, Saccharum giganteum, Saururus cernuus, Scirpus cyperinus, Schoenoplectus spp. (= Scirpus spp.), Solidago gigantea, Thelypteris palustris var. pubescens, Triadenum walteri, Vernonia gigantea, and Woodwardia areolata. (Description based on Smith 1996b.) |
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