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Description |
Comm #6811
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Serie Preliminar de Clethra cuneata - Weinmannia sorbifolia
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accession code: urn:lsid:vegbank.org:commConcept:37068-{809B767B-F35C-4227-A996-3AB71BC7CA29}
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NatureServe Biotics 2019 |
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Mesotropical pluviestacional húmedo, 1900-2000 hasta 2800-2900 m. Combinación florística diferencial preliminar: <i>Alchornea pearcei, Cedrela lilloi, Ceroxylon parvifrons, Cinchona micrantha, Cinchona pubescens, Clethra cuneata, Clethra laevigata, Freziera lanata, Freziera reticulata, Siparuna muricata, Styrax pentlandianus, Ternstroemia asymmetrica, Ternstroemia subserrata, Weinmannia microphylla, Weinmannia pentaphylla, Weinmannia pinnata</i> y <i>Weinmannia sorbifolia</i>. Mayores áreas potenciales y/o actuales conocidas: Yungas, Cuenca Alta Río Beni; Dept. La Paz (Yungas del Boopi) y Dept. Cochabamba (Yungas del Cotacajes). |
Comm #6812
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Carex lasiocarpa - (Carex rostrata) - Equisetum fluviatile Herbaceous Vegetation
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accession code: VB.CC.36978.CEGL005229
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Midwestern Ecology Working Group... |
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This community is found typically on floating (or occasionally grounded) mats on the edges of lakes and streams in the Great Lakes region of the United States and Canada. Lakes and streams have low wave and current energy and seasonally flood the mat. Permanent surface pools and small hummocks with <i>Sphagnum</i> spp. and ericaceous shrubs may be present. The substrate is a mat of fibric to mesic peat held together by roots and rhizomes. Graminoids dominate the stand, with shrub cover typically much less than 25%. <i>Myrica gale</i> can be among the more common shrubs. The graminoid <i>Carex lasiocarpa</i> can form extensive "lawns." Other herbaceous species present include <i>Carex rostrata, Eleocharis elliptica, Equisetum fluviatile, Comarum palustre (= Potentilla palustris), Rhynchospora alba, Triadenum fraseri, Utricularia intermedia</i>, and <i>Utricularia minor</i>. <i>Menyanthes trifoliata</i> can occur at high cover, especially at the outer edge of the floating mat. |
Comm #6813
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CEGL004551
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accession code: VB.CC.6093.CEGL004551
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
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Comm #6814
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Schoenus nigricans Seasonally Flooded Herbaceous Alliance
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accession code: VB.CC.23415.SCHOENUSNIGRICA
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Southeastern Ecology Working Gro... |
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This alliance consists of calcareous wetlands characterized by, and dominated or codominated by, Schoenus nigricans. |
Comm #6815
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Spartina pectinata - Muhlenbergia richardsonis - Sporobolus heterolepis - Oligoneuron album - Euthamia graminifolia Sparse Vegetation
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accession code: VB.CC.36746.CEGL005233
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Midwestern Ecology Working Group... |
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This river ledge pavement community is found in the United States and Canada, ranging from northern Michigan, northern Wisconsin and southern Ontario to northern New York. Stands occur as small patches on limestone ledges along a river's shore; these ledges are scoured by river water and ice during periods of peak water flow. Typically, the community has an open canopy with less than 10% cover of trees or shrubs. The ground layer is dominated by grasses and sedges, or a mosaic of pavement patches and grassy patches. Cover of herbs is variable, with some areas having nearly 100% cover. Other areas have a lot of exposed rock pavement, with as little as 15% cover of herbs, and are confined to linear rock crevices. Characteristic species include <i>Euthamia graminifolia, Muhlenbergia richardsonis, Oligoneuron album (= Solidago ptarmicoides), Spartina pectinata</i>, and <i>Sporobolus heterolepis</i>. |
Comm #6816
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Sporobolus heterolepis - Schizachyrium scoparium - (Carex scirpoidea) / (Juniperus horizontalis) Herbaceous Vegetation
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accession code: VB.CC.36805.CEGL005234
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Midwestern Ecology Working Group... |
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The little bluestem alvar grassland type is found primarily in the upper Great Lakes region of the United States and Canada, in northern Michigan and in Ontario. These grasslands occur on very shallow, patchy soils (usually less than 20 cm deep, average is about 6 cm deep) on flat limestone and dolostone outcrops (pavements). Soils are loams high in organic matter. This community often has a characteristic soil moisture regime of alternating wet and dry periods; they can have wet, saturated soils in spring and fall, combined with summer drought in most years (except unusually wet years). In large patches over 50 acres (20 ha) this grassland often occurs as a small-scale matrix, with smaller patches of other alvar communities occurring within the larger patch of little bluestem alvar grassland, forming a landscape mosaic. The most commonly associated alvar communities are creeping juniper - shrubby cinquefoil alvar pavement, tufted hairgrass wet alvar grassland, alvar nonvascular pavement, and white cedar - jack pine / shrubby cinquefoil alvar savanna. The vegetation is dominated by grasses and sedges, which usually have at least 50% cover. Characteristic species of the grassland are <i>Sporobolus heterolepis, Schizachyrium scoparium, Juniperus horizontalis, Carex scirpoidea, Deschampsia caespitosa, Packera paupercula (= Senecio pauperculus)</i>, and <i>Carex crawei</i>. There is usually less than 10% cover of shrubs over 0.5 m tall; however there may be as much as 50% cover of dwarf-shrubs (under 0.5 m tall) especially <i>Juniperus horizontalis</i>. This dwarf-shrub is shorter than the dominant grasses, and usually is found under the canopy of grasses, so the physiognomic type is here considered a grassland (in spite of relatively high cover of dwarf-shrubs). Less than 50% of the ground surface is exposed bedrock (including bedrock covered with nonvascular plants: lichens, mosses, algae). |
Comm #6817
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CEGL004677
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accession code: VB.CC.6199.CEGL004677
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
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Comm #6818
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Picea mariana / Ledum groenlandicum - Empetrum nigrum / Cladina spp. Dwarf-shrubland
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accession code: VB.CC.31107.CEGL006268
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Eastern Ecology Working Group of... |
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This boreal heathland community develops at the base of some talus slopes in the northeastern United States and (possibly) adjacent Canada. Cold air draining to the base of the slope allows ice to persist in crevices through most of the growing season, even at these moderate elevations (215-670 m [700-2200 feet]). This creates a cold microclimate, and the vegetation features many species with affinities to boreal or higher-elevation settings. As with talus slopes in general, soil development is extremely limited, although in this type there may be some patches of peaty soils developing among the boulders. The vegetation is predominantly dwarf-shrubs and stunted shrub-like conifers, in patches among the talus, with a scattered and broken tree canopy. Herbs are sparse. The bryoid layer is typically very well-developed, with mats of reindeer lichens undulating across the talus and higher bryophyte cover than in other talus settings. The scattered trees are typically <i>Picea mariana, Picea rubens</i>, and <i>Betula papyrifera</i>. <i>Abies balsamea</i> and (in relatively southern examples) <i>Tsuga canadensis</i> are occasional. <i>Sorbus americana</i> or <i>Sorbus decora</i> may occur as scattered shrubs. Dwarf-shrubs characteristically include <i>Ledum groenlandicum, Gaultheria hispidula, Vaccinium angustifolium, Vaccinium myrtilloides, Vaccinium vitis-idaea, Kalmia angustifolia</i>, and, in the more northerly occurrences, <i>Vaccinium uliginosum</i> and <i>Empetrum nigrum</i>. Herbs may include <i>Polypodium virginianum</i> and/or <i>Polypodium appalachianum</i> and <i>Mitella nuda</i>. Typical bryoids are <i>Cladina</i> spp., <i>Cladonia</i> spp., <i>Hylocomium splendens, Pleurozium schreberi, Sphagnum capillifolium, Polytrichum strictum</i>, and <i>Bazzania trilobata</i>. The combination of setting and flora make this type distinctive. |
Comm #6819
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Quercus falcata - Quercus phellos / Ilex opaca Forest
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accession code: VB.CC.31254.CEGL006390
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Eastern Ecology Working Group of... |
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This community is a mesic oak forest of the central Atlantic Coastal Plain. In general, this vegetation borders wetlands and occurs on sand in areas with a high water table. Canopy dominants include <i>Quercus falcata, Quercus phellos, Quercus alba, Quercus michauxii</i>, with <i>Liquidambar styraciflua</i> and <i>Acer rubrum</i> common associates. Pines may be present, including <i>Pinus rigida</i> or <i>Pinus echinata</i> in New Jersey, or <i>Pinus taeda</i> in Delaware and Maryland. <i>Pinus serotina</i> is reported in some Delaware examples of this community. A subcanopy is often present with <i>Ilex opaca, Vaccinium corymbosum</i>, and <i>Amelanchier canadensis</i>. <i>Gaylussacia frondosa</i> forms a patchy shrub layer draped with <i>Smilax rotundifolia</i>, and the herb layer is sparse with species such as <i>Chasmanthium laxum, Osmunda regalis</i>, and <i>Mitchella repens</i>. |
Comm #6820
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CEGL000869
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accession code: VB.CC.3473.CEGL000869
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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