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Name
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Reference
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Plots↓
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Description |
Comm #5201
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A.1830
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accession code: VB.CC.1533.A1830
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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This alliance includes vegetation dominated by algal mats in large, seasonally flooded depressions and flats in south Florida and the West Indies. Vegetation of this alliance consists of mixtures of cyanobacteria and green algae. The only known association in this alliance is broadly defined, and consists of a dense fibrous algal periphyton developed over thin layers of oozy marl overlying oolitic limestone. The cyanobacteria in the algal mats precipitate CaCO3, creating the calcitic marl. A very sparse growth of vascular plants sometimes occurs, including ~Eleocharis$ spp., ~Utricularia$ spp., or widely scattered and extremely stunted ~Rhizophora mangle$. ~Chara$ spp. are sometimes abundant, and are typically imbedded in the algal periphyton. Occurrences of this alliance can be large (hundreds to thousands of acres). |
Comm #5202
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Eriogonum strictum / Poa secunda Dwarf-shrub Herbaceous Vegetation
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accession code: VB.CC.34166.CEGL001788
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Western Ecology Working Group of... |
0
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This association is a depauperate scabland. Stands occur on rocky, barely vegetated sites on the Wallowa Valley Ranger District of northeastern Oregon and in Idaho. This vegetation may also occur in Washington and California. Sites are found at elevations of 1280-1555 m (4200-5100 feet) upon upper slopes and ridgelines with southwest aspects and an average slope of 18%. Soils are shallow loess deposits over basalt. <i>Eriogonum strictum</i> dominates this sparse vegetation with only 14% cover. <i>Poa secunda, Pseudoroegneria spicata, Sedum stenopetalum</i> and <i>Sedum lanceolatum</i> are the most common associated species with respective cover of 1-15%, 0-10%, 0-3%, 0-3%. The successional status of this type is not clear, since <i>Eriogonum strictum</i> is not impacted by grazing, while the native bunchgrasses are. |
Comm #5203
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Populus angustifolia - Juniperus scopulorum Woodland
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accession code: VB.CC.26950.POPULUSANGUSTIF
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Western Ecology Working Group of... |
0
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Populus angustifolia- and Juniperus scopulorum-dominated riparian areas are uncommon. This community occurs along lower foothill streams with perennial to intermittent streamflows. Total biomass and canopy cover are usually low. The association is characterized by an open canopy of Populus angustifolia and Juniperus scopulorum, often with little else growing in the understory. The species composition and percent cover are variable and depend on aspect, elevation, and streamflow, in addition to the degree of disturbance by recreational use and livestock grazing. |
Comm #5204
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CEGL000842
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accession code: VB.CC.3446.CEGL000842
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #5205
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Eriogonum compositum / Poa secunda Dwarf-shrub Herbaceous Vegetation
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accession code: VB.CC.33733.CEGL001784
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Western Ecology Working Group of... |
0
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This type is associated with shallow soils in the steppe zones of the Columbia Basin of Washington and Oregon. This is an open to sparsely vegetated short grassland dominated by <i>Poa secunda</i> with an open dwarf-shrub layer of <i>Eriogonum compositum</i>. It is typically found within <i>Festuca idahoensis</i> steppe landscapes and associated with other lithosolic associations. |
Comm #5206
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A.2004
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accession code: VB.CC.1705.A2004
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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This alliance includes tropical and subtropical tidal marshes dominated by ~Schoenoplectus californicus (= Scirpus californicus)$. It is found in tidally influenced oligohaline marshes along the Gulf Coast of the United States. Additional common species may include ~Spartina patens$, Cyperaceae, ~Typha domingensis, Typha latifolia, Ludwigia$ spp., ~Pluchea$ spp., ~Phragmites australis, Setaria$ spp., ~Nymphaea odorata, Panicum hemitomon, Bidens laevis$, and others. |
Comm #5207
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Eleocharis palustris - Juncus balticus Herbaceous Vegetation
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accession code: VB.CC.34029.CEGL001835
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Western Ecology Working Group of... |
0
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This saline-tolerant herbaceous association is described from playa flats in central Utah. Occurrences form a belt around springs rising from the former bed of Pleistocene Lake Bonneville at an elevation of 1370 m (4495 feet). The clay-loam soils supporting this association tend to have lower conductivity and higher levels of calcium, copper and nitrogen when compared with neighboring spring-associated communities. Dominance by <i>Eleocharis palustris</i> is diagnostic of this association; <i>Juncus balticus</i> is always present and may be codominant. <i>Muhlenbergia asperifolia, Glaux maritima</i>, and <i>Carex aquatilis</i> may occur with low cover. |
Comm #5208
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Leiophyllum buxifolium Dwarf-shrubland
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accession code: VB.CC.36157.CEGL003951
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Southeastern Ecology Working Gro... |
0
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This evergreen, sclerophyllous dwarf-shrubland occurs at the highest elevations in the southern Appalachian Mountains on steep, exposed slopes. It is typically found at elevations over 1770 m (5800 feet) in northwestern North Carolina. This dwarf-shrubland may occur as inclusions in other communities or as extensive mats. It is dominated by <i>Leiophyllum buxifolium</i> growing in dense mats with a krummholz structure. Occurrences of this community may have significant areas of bare rock but are at least 25% vegetated with at least 75% of the total shrub cover comprised of <i>Leiophyllum buxifolium</i>. Openings in the shrub stratum may contain sparse herbaceous cover including <i>Selaginella tortipila, Zigadenus leimanthoides</i> and <i>Deschampsia flexuosa</i>. Other shrub species that may occur include <i>Rhododendron catawbiense</i> and <i>Vaccinium corymbosum</i>. Mosses and lichens are also typical in more open occurrences. The largest occurrences of this shrubland are 1-2 hectares. An extreme environment with steep topography, high solar irradiation, desiccating winds in combination with shallow, nutrient-poor soils maintains this community as a topo-edaphic climax. This community often occurs adjacent to or grades into high-elevation rock outcrop communities and other montane shrublands. |
Comm #5209
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A.1386
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accession code: VB.CC.1158.A1386
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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This alliance, which is found in the eastern and southeastern United States, inhabits seasonally flooded marshes or emergent zones of upland depression ponds. The vegetation is dominated by ~Scirpus cyperinus$, or at least with substantial cover of this species. The habitat of this alliance may have a pronounced seasonal fluctuation in water level, becoming saturated to ponded in the winter and often drying completely in the summer. The vegetation is typically dominated by patches or zones of ~Scirpus cyperinus$; other species present may include ~Carex$ spp., ~Dichanthelium$ spp., ~Dulichium arundinaceum, Glyceria$ spp., ~Juncus$ spp., ~Leersia$ spp., ~Panicum rigidulum, Rhynchospora$ spp., and ~Thelypteris palustris$, as well as other species of ~Scirpus$ including ~Scirpus microcarpus (= Scirpus rubrotinctus)$ and ~Scirpus atrovirens$. The vegetation may consist of monospecific clumps of the component species, either scattered in the marsh or around the pond margin. Mats of ~Sphagnum$ mosses may be prominent in some examples (e.g., ~Sphagnum lescurii, Sphagnum pylaesii, Sphagnum cuspidatum, Sphagnum palustre$, and ~Sphagnum recurvum$. Some examples may have scattered woody plants, including shrubs and small trees such as ~Acer rubrum, Alnus serrulata, Cephalanthus occidentalis, Rosa palustris$, and ~Nyssa sylvatica$. To the north, ~Vaccinium corymbosum$ is a typical associate, while ~Hibiscus moscheutos, Itea virginica, Liquidambar styraciflua, Pinus taeda$, and ~Quercus phellos$ occur more frequently in the southern portion of the range. Sparsely distributed shrubs in montane examples may include ~Vaccinium$ spp. and ~Leucothoe racemosa$. The floristics and physiognomic expression may vary with context and management. In a burned or mowed context, examples of this vegetation type may grade down into other wetland herbaceous types, but in a more forested context may grade into upland depression forests. |
Comm #5210
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Populus tremuloides - Quercus (ellipsoidalis, macrocarpa) / Andropogon gerardii Shrubland
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accession code: VB.CC.36784.CEGL002197
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Midwestern Ecology Working Group... |
0
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This scrub aspen - oak community type occurs in the upper midwestern United States in the pine barrens region of Wisconsin. Stands occur on sandy, somewhat acidic soils. Frequent fires reduce the woody vegetation to a scrub layer. The vegetation is comprised of a scrubby, fire-tolerant woody layer between 1 and 3 m tall, with a rich herbaceous layer. The scrub or brush layer contains <i>Quercus macrocarpa, Quercus ellipsoidalis</i> and <i>Populus tremuloides</i>. Various shrub species may also occur, including <i>Corylus americana, Gaylussacia baccata, Rosa</i> spp., <i>Vaccinium angustifolium</i>, and <i>Salix</i> spp. The herbaceous layer resembles that of open pine barrens, with species such as <i>Comptonia peregrina, Gaultheria procumbens, Pteridium aquilinum</i>, and other prairie forbs present. |
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