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Reference
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Description |
Comm #5231
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Schoenoplectus americanus Western Herbaceous Vegetation
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accession code: VB.CC.32507.CEGL001841
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Western Ecology Working Group of... |
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This wetland herbaceous association ranges from California to Washington and east to Colorado and Wyoming. This description is based on information from Great Sand Dunes National Park and Preserve in Colorado. Additional global information will be added as it becomes available. This association is found within basin floor sabkhas, swales, or dunefields at elevations ranging from 2300 to 2340 m. This palustrine system can be seasonally flooded, temporarily flooded, or saturated. Soils are very poorly drained clays or very poorly to poorly drained loamy sands. Ground cover includes litter and duff (30-35%) and bare soil (10-40%). Herbaceous vegetation cover ranges from 55-95%, which is largely comprised of <i>Schoenoplectus americanus</i> with 20-70% cover. Additional species that occur in lesser amounts include <i>Cleome multicaulis, Distichlis spicata</i>, and <i>Juncus balticus</i>. |
Comm #5232
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Hawai'i Subalpine Mesic Shrubland
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accession code: urn:lsid:ecoobs.vegbank.org:commConcept:9048-{FC681F5C-2B22-4AA2-B01B-03B7CBF8CC26}
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Comer et al. 2003 |
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Comm #5233
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Hawai'i Montane-Subalpine Dry Shrubland
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accession code: urn:lsid:ecoobs.vegbank.org:commConcept:9047-{EA41F116-7C34-4D84-BE61-A75EC796887E}
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Comer et al. 2003 |
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Comm #5234
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Fraxinus anomala - Rhus trilobata Talus Shrubland
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accession code: VB.CC.31880.CEGL003963
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Western Ecology Working Group of... |
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This shrubland association occurs on steep, rocky colluvial slopes as well as on thin soils near the edges of canyon and mesa rims. Sites are located on gentle to steep (1- to 34-degree) slopes between 1195 and 1536 m elevation, with a strong orientation toward northerly aspects. The unvegetated surface is mostly covered by rocks, gravel, boulders, bedrock and bare soil, with little litter or dead wood evident. Soils tend to be sandy, with a few stands on silt loams or clay loams derived from sandstone and shale. This open shrubland is characterized by sparse to low cover (<15% total cover) from a mix of xeric shrubs, among which <i>Fraxinus anomala</i> and <i>Rhus trilobata</i> are conspicuous and usually at least codominant. Many other shrub species are usually present, including <i>Artemisia bigelovii, Atriplex confertifolia, Ephedra torreyana, Chrysothamnus viscidiflorus var. stenophyllus</i>, and <i>Gutierrezia sarothrae</i>. The herbaceous layer may include many species but never provides more than a few percent cover; <i>Pleuraphis jamesii, Achnatherum hymenoides, Stanleya pinnata, Chamaesyce fendleri</i>, and <i>Xylorhiza</i> spp. are the most consistent species. Biological soil crust formation is rare on these active slopes. |
Comm #5235
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Carex rupestris - Potentilla ovina Herbaceous Vegetation
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accession code: VB.CC.33642.CEGL001862
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Western Ecology Working Group of... |
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This association has been reported from only southwestern Montana on the Beaverhead, Madison, East Pioneer and Tendoy mountain ranges. Occurring mostly as small to infrequently large patches, this vegetation is strictly an alpine community (documented elevation range from 2900-3170 m [9500-10,400 feet]). Stands occupy the most exposed and wind-swept upper slopes, saddles and ridgetops, and sites are most probably blown snow-free in winter. This association has been found only on calcareous parent materials. Wind deflation often results in a gravelly pavement with sites having an average of more than 65% exposed substrate. Structurally, this association is predominantly an alpine cushion plant community that can grade to alpine turf community on more protected sites. Graminoid cover averages 11%; species with 50% or greater constancy include <i>Carex rupestris, Carex obtusata, Carex elynoides, Leucopoa kingii (= Festuca kingii), Festuca brachyphylla</i>, and <i>Elymus scribneri (= Agropyron scribneri</i>). Only the first two graminoid species noted are diagnostic for the type. Cushion plants form the dominant aspect for this community (29% canopy cover); primary among which are <i>Phlox pulvinata, Potentilla ovina, Minuartia obtusiloba (= Arenaria obtusiloba), Oxytropis campestris, Erigeron compositus</i>, and <i>Eritrichium nanum</i> (only the first two species noted have been recognized as diagnostic for the type). A very stunted form of <i>Dasiphora fruticosa ssp. floribunda (= Pentaphylloides floribunda)</i> was the only shrub, sporadically noted. Lichen and mosses constitute less than 2% canopy cover on average. This type is usually noted to grade to a dry turf type ~<i>Carex elynoides</i> Herbaceous Vegetation (CEGL001852)$$ or ~<i>Carex scirpoidea - Potentilla diversifolia</i> Herbaceous Vegetation (CEGL001867)$$, a moist turf association, both of which occur on relatively more protected sites, ostensibly having a more favorable moisture regime. |
Comm #5236
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Uniola paniculata - Hymenocallis latifolia Herbaceous Vegetation
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accession code: VB.CC.34990.CEGL003966
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Southeastern Ecology Working Gro... |
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This association consists of herbaceous beach dune vegetation in extreme southern Florida. Examples are usually dominated by <i>Uniola paniculata</i>, with other herbs including <i>Hymenocallis latifolia, Sesuvium portulacastrum, Panicum</i> spp., <i>Sporobolus virginicus, Sporobolus</i> spp., <i>Chamaesyce mesembrianthemifolia, Suaeda linearis, Flaveria linearis, Melanthera</i> sp., with slight to substantial cover of woody shrubs and vines of <i>Argusia gnaphalodes, Suriana maritima, Pithecellobium keyense, Lantana involucrata, Cynanchum northropiae</i>, and <i>Caesalpinia bonduc</i>. This community occurs in only a limited number of sites in the Florida Keys, primarily in the 'Sand Keys' portion of the Lower Keys, such as Bahia Honda State Park. Many examples have substantial cover of woody vines and shrubs. |
Comm #5237
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Carex scirpoidea ssp. pseudoscirpoidea Herbaceous Vegetation
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accession code: VB.CC.34049.CEGL001865
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Western Ecology Working Group of... |
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Comm #5238
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Carex scirpoidea - Geum rossii Herbaceous Vegetation
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accession code: VB.CC.34062.CEGL001866
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Western Ecology Working Group of... |
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This community has been described for only southwestern Montana in the Tobacco Root, East Pioneer and Madison ranges. Stands may be restricted to non-calcareous substrates, having been reported from granitic, intrusive volcanics, and gneiss parent materials (all non-calcareous) in mountain ranges that have an abundance of exposed calcareous substrates. This association spans nearly the full range of alpine elevations in this portion of Montana, from 2835 to 3152 m (9300-10,340 feet). Sampled sites are about evenly divided between low-gradient slopes and steeper slopes, with all aspects represented. The most characteristic environmental parameter is some degree of enhanced effective moisture (relative to dry turf associations) through increased snowpack or delayed snowmelt. This vegetation occurs as small to large patches, often scattered among boulders that act as eddy current creating snow fences, serving to increase snowpack in their immediate vicinities. Fibrous-rooted graminoids dominate and create an alpine turf community, not much exceeding 1 dm in height, with the exception of flowering stalks. Graminoids average about 40% canopy cover. Though named for <i>Carex scirpoidea</i>, which has a high constancy and average canopy cover (24%) and is considered diagnostic, other <i>Carex</i> spp. (<i>Carex phaeocephala, Carex albonigra, Carex atrosquama</i>) are diagnostic as well (note none of the above-named Carices are employed as naming-species elsewhere in the National Vegetation Classification System). Other high-constancy graminoids include <i>Luzula spicata, Poa alpina, Poa secunda</i>, and <i>Trisetum spicatum</i>, with the moister sites having scattered <i>Deschampsia caespitosa</i> (under 5% cover). Exhibiting 100% constancy and 37% average canopy cover <i>Geum rossii</i> is a conspicuous dominant; other high-constancy forbs include <i>Minuartia obtusiloba, Potentilla diversifolia, Phlox pulvinata, Polygonum bistortoides, Erigeron simplex, Lloydia serotina</i>, and <i>Lupinus argenteus</i>. |
Comm #5239
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Carex lachenalii Herbaceous Vegetation
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accession code: VB.CC.33764.CEGL001871
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Western Ecology Working Group of... |
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Comm #5240
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Rhus trilobata / Schizachyrium scoparium Shrub Herbaceous Vegetation
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accession code: VB.CC.20696.RHUSTRILOBATASC
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Western Ecology Working Group of... |
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