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Name
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Reference
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Plots↓
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Description |
Comm #4641
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Artemisia cana ssp. cana / Hesperostipa comata Shrub Wet Meadow
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accession code: urn:lsid:vegbank.org:commConcept:30462-{7818C6FE-2AE6-4281-8253-C3DB83DEA00B}
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NatureServe Biotics 2019 |
1
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This shrub prairie association, which generally occurs in small patches (less than 1 hectare), occurs in the northwestern Great Plains. In Montana, it is found on benches to gently inclined slopes (30% maximum recorded) in the vicinity of breaklands. Similar habitats (old river terraces, badlands, ravine sideslopes and valley walls) support its occurrence in Alberta. Sites occur on various parent materials, but mostly well-drained, often sandy, glacial drift and sandy alluvium. <i>Artemisia cana</i> is decidedly the dominant shrub with canopy coverages to 50%, but averaging around 25%, which places it on the cusp of being a true shrub type. <i>Artemisia frigida</i> is the only shrub/subshrub with greater than 50% constancy and its cover does not exceed 3%. A number of graminoids have high constancy, including <i>Bouteloua gracilis, Carex filifolia, Koeleria macrantha</i>, and <i>Poa secunda</i>, but only <i>Hesperostipa comata</i> exhibits both 100% constancy and the highest cover values (averaging 38%). Forbs constitute an insignificant component, virtually none occurring in greater than trace amounts. Those exceeding 50% constancy are <i>Sphaeralcea coccinea, Pediomelum argophyllum</i>, and <i>Gaura coccinea</i>. This association is hypothesized to represent the driest environment capable of supporting <i>Artemisia cana</i>. Occasional fire probably has reduced <i>Artemisia</i> spp. cover and density to low levels and maintains the shrub herbaceous community structure. |
Comm #4642
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Panicum obtusum - Bouteloua dactyloides Wet Meadow
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accession code: urn:lsid:vegbank.org:commConcept:30482-{E152FA61-DA01-4E64-9EC5-1947FA4E0FBC}
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NatureServe Biotics 2019 |
1
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Stands are dominated by <i>Panicum obtusum</i> and <i>Bouteloua dactyloides</i>. This association occurs from Colorado and Oklahoma south to possibly northern Mexico. Associates in Oklahoma include <i>Bouteloua gracilis, Iva axillaris, Pascopyrum smithii, Ratibida tagetes</i>, and <i>Schedonnardus paniculatus</i>. The Oklahoma habitat is described as mesic soils in pastures, prairies, riparian areas, and playa lakes. |
Comm #4643
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Spartina gracilis Wet Meadow
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accession code: urn:lsid:vegbank.org:commConcept:30497-{E5596602-8F3F-401A-AFCD-B5ED5C66AA4E}
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NatureServe Biotics 2019 |
1
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This association has only been described from plots in northern Colorado, Utah and Oregon, but it is likely to occur throughout the western U.S. In Colorado, these wetland meadows occur in small patches in swales and on banks, terraces and overflow channels of gentle-gradient streams and rivers at low to middle elevations. Soils are alkaline, fine-textured silt loams and clay loams. The vegetation is a sparse to thick herbaceous layer of grasses and grasslike plants that is dominated by <i>Spartina gracilis</i>. Other herbaceous species that are known to occur include <i>Equisetum hyemale, Distichlis spicata, Triglochin maritima</i>, and <i>Asclepias speciosa</i>. Deciduous trees and shrubs occur with minimal cover and are usually restricted to the margins of stands. This association requires a seasonally high water table and alkaline soils in order to persist. Information on stands that occur outside Colorado will be added later as it becomes available. |
Comm #4644
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Festuca idahoensis - Elymus trachycaulus Grassland
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accession code: urn:lsid:vegbank.org:commConcept:30523-{84AF7B7C-E848-48C1-A772-622E7823D354}
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NatureServe Biotics 2019 |
1
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This grassland occurs in Montana, Wyoming and Colorado on relatively high mountain slopes and alluvial terraces of gentle terrain (4-12%) from 1100- 3322 m (3600-10,900 feet). It occurs in mesic habitats with 45-79 cm (18-31 inches) annual average precipitation. Soils are deep, well-drained loams with a variety of parent materials. Ground cover has 4-13% bare ground, as much as 40% litter, and some nonvascular cover. This is a mesic grassland with low stature (<0.5 m), high species diversity, and a high proportion of forb cover (30-70% cover), more than other western Montana grassland types. <i>Elymus trachycaulus</i> and <i>Festuca idahoensis</i> are consistently present, and both are dominant grasses within stands. Other important graminoids include <i>Carex</i> spp., <i>Koeleria macrantha, Danthonia intermedia, Achnatherum occidentale, Achnatherum lettermanii, Melica spectabilis, Bromus ciliatus</i>, and <i>Poa fendleriana</i>. Usually abundant forbs include <i>Geum triflorum, Potentilla gracilis, Achillea millefolium, Geranium viscosissimum, Agoseris glauca</i>, and <i>Campanula rotundifolia</i>. |
Comm #4645
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Sporobolus airoides Southern Plains Wet Meadow
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accession code: urn:lsid:vegbank.org:commConcept:30594-{0F25D960-61E3-4995-A1C7-144435A572EA}
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NatureServe Biotics 2019 |
1
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This alkali sacaton mesic grassland community is found in the southwestern Great Plains, on the Colorado Plateau, in the southwestern United States, and adjacent Mexico. The community is dominated by medium-tall and short grasses. <i>Sporobolus airoides</i> is a dominant, often accompanied by <i>Symphyotrichum subulatum, Pascopyrum smithii, Bouteloua dactyloides, Distichlis spicata, Hordeum jubatum</i>, and <i>Bouteloua gracilis</i>. Scattered shrubs, such as <i>Atriplex</i> spp. or <i>Sarcobatus vermiculatus</i>, may be present. Forb cover is also minor. Stands occur on slightly to moderately saline, nearly level bottomlands and terraces. Additional moisture from washes and sheetflow runoff are important for most stands. Substrates are shallow, moderately well- to poorly-drained, silty clay soils formed in alluvium. |
Comm #4646
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LEYMUS HERBACEOUS ALLIANCE
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accession code: VB.cc.30110.LEYMUSHERBACEOU
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NVC 2004 |
1
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Comm #4647
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Carex buxbaumii Fen
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accession code: urn:lsid:vegbank.org:commConcept:30715-{B044479D-5B39-4420-87A5-01613F47EB49}
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NatureServe Biotics 2019 |
1
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This vegetation has been found in fens and wet meadows in the mountains of Utah, Idaho, Montana, and western Wyoming at elevations 1700-3200 m. Sites are flat and range from moderately broad valley bottoms to forest openings. Size of wetland is dependent on the presence of permanently saturated soils and it often occurs along streams and in the wettest portion of the wetland complex. Soils are mineral from alluvium with accumulations of well-decomposed organic matter throughout the upper soil horizon (20-50 cm deep). Stands have a dense perennial graminoid layer characterized by 25% or more cover of <i>Carex buxbaumii</i>. <i>Carex aquatilis, Carex saxatilis</i> and <i>Carex utriculata</i> are usually present and occasionally codominant. Other common species include <i>Deschampsia cespitosa, Caltha leptosepala, Pedicularis groenlandica</i>, and <i>Ligusticum tenuifolium</i>. Occasional shrubs such as <i>Salix planifolia, Vaccinium uliginosum</i>, and <i>Dasiphora fruticosa ssp. floribunda</i> may be scattered in the stand. Adjacent stands are often dominated by sedges such as <i>Carex utriculata</i> and <i>Carex aquatilis</i>. This vegetation is separated from adjacent wetlands by the dominance or codominance of <i>Carex buxbaumii</i>. |
Comm #4648
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Schoenoplectus americanus Western Marsh
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accession code: urn:lsid:vegbank.org:commConcept:30750-{E0EFF90B-EC32-4514-8770-567729786CEE}
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NatureServe Biotics 2019 |
1
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This wetland herbaceous association ranges from California to Washington and east to Colorado. 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 composed 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 arcticus ssp. littoralis</i>. |
Comm #4649
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Quercus mohriana Shrubland Alliance
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accession code: VB.cc.30817.QUERCUSMOHRIANA
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NVC 2004 |
1
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Quercus wislizeni Forest Alliance
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accession code:
NOT CURRENTLY ACCEPTED
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MCV2 |
1
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