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Name
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Reference
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Description |
Comm #11191
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A.1680
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accession code: VB.CC.1433.A1680
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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This lush herbaceous alliance has been described from semipermanently flooded areas in the mountains of western Wyoming. Elevations are 1700-1800 m. Stands occur on moderate to steep, mid and lower slopes and toeslopes near seeps. Soils are saturated, but not stagnant, and composed of a sandy-textured mineral horizon with a thin organic layer. Stands have a medium-tall (0.5 m), moderately dense to dense herbaceous layer that is codominated by the perennial forbs ~Senecio triangularis$ and ~Mimulus guttatus$. Associated species include mesic and wetland forbs such as ~Epilobium$ spp., ~Mimulus lewisii, Mitella pentandra, Parnassia fimbriata, Saxifraga odontoloma$, and the graminoid ~Agrostis exarata$. Mosses form a nearly continuous ground cover between the forbs. Shrubs and trees are not present. |
Comm #11192
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Ericameria nauseosa / Pseudoroegneria spicata Shrubland
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accession code: VB.CC.33757.CEGL001330
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Western Ecology Working Group of... |
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This common rabbitbrush shrubland type is found in localized areas across the northern Great Plains of the United States. As described from the Dakotas, stands occur either on dry, steep slopes along roadcuts or in heavily grazed floodplains. In the Dakotas, the vegetation has an open structure, with clumps of shrubs around 0.5-1 m tall scattered over a medium-tall herbaceous layer. <i>Ericameria nauseosa (= Chrysothamnus nauseosus)</i> is the dominant shrub. Other less common shrubs include <i>Prunus virginiana</i> and <i>Symphoricarpos occidentalis</i>. The herbaceous layer may contain the graminoids <i>Elymus trachycaulus ssp. trachycaulus</i> and <i>Pascopyrum smithii</i>. Forbs include <i>Melilotus officinalis</i>. Stands may contain a variety of other weedy species. Farther west, in Montana, the dominant graminoid is <i>Pseudoroegneria spicata</i>. |
Comm #11193
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Flourensia cernua / Sporobolus airoides Shrubland
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accession code: VB.CC.33716.CEGL001337
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Western Ecology Working Group of... |
0
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From Muldavin et al. (2000b): On White Sands, this is a major community of the Jornada del Muerto and Tularosa basins and along the alluvial piedmont slopes of the Oscura and San Andres mountains. Stands are commonly found in shallow swales in basins and shallow drainages of both upper and lower piedmont slopes at elevations of 1160 to 1650 m (3800-5400 feet). Soils are heavy clay loams or silty loams typical of depositional swale sites. Most slope grades are low to flat. This community is characterized by an open canopy of <i>Flourensia cernua</i> with an abundant to luxuriant grass understory. <i>Larrea tridentata, Atriplex canescens</i>, and <i>Opuntia leptocaulis</i> are often interspersed in the shrub canopy. The understory is dominated by thick, dense patches of <i>Sporobolus airoides</i> with scattered patches of <i>Scleropogon brevifolius</i> intermixed. <i>Acourtia nana, </i><i>Lepidium montanum</i>, and <i>Hoffmannseggia glauca </i>are the most consistent forbs scattered within the grasses, but a variety of other forbs may occur in individual stands. |
Comm #11194
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Acacia neovernicosa / Flourensia cernua Shrubland
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accession code: VB.CC.34536.CEGL001341
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Western Ecology Working Group of... |
0
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From Muldavin et al. (2000b): This is a provisional Chihuahuan shrubland type in the Southwest and minor type on White Sands Missile Range. Stands occur on red sandstone slopes that are moderately steep to steep and have warm exposures. The dominant vegetation is characterized by moderately open to moderately closed shrub canopies (25-70% cover) of <i>Acacia neovernicosa</i> and <i>Flourensia cernua</i>. A sparse understory is typical, but stands may include some (less than 1% cover) <i>Muhlenbergia porteri, Achnatherum eminens (= Stipa eminens), Eriogonum abertianum, Bahia absinthifolia</i>, or <i>Acourtia nana</i>. |
Comm #11195
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Sarcobatus vermiculatus Disturbed Shrubland
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accession code: VB.CC.31911.CEGL001357
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Western Ecology Working Group of... |
0
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This greasewood shrubland occurs on saline soils of terraces, swales, alluvial fans and flats, valley floors, playas, toeslopes and ridges throughout the Colorado Plateau and Great Basin and extends to mountain valleys in the southern Rocky Mountains. It is distinguished from other <i>Sarcobatus vermiculatus</i> associations in that disturbance has removed most or all of the native herbaceous understory. Black greasewood will increase in density at the expense of grasses such as <i>Sporobolus airoides</i> under conditions of heavy grazing, since the shrub is only moderately palatable and is somewhat poisonous to livestock. Soil textures in these communities range from sandy loam to silty clay and may have a white salt crust on the soil surface. <i>Sarcobatus vermiculatus</i> dominates the sparse to moderately dense shrub layer, usually with a minor component of <i>Ericameria nauseosa, Suaeda moquinii (= Suaeda torreyana), Opuntia polyacantha, Atriplex canescens</i>, or <i>Atriplex confertifolia</i>. If <i>Artemisia tridentata</i> is present, it is with very low cover. The understory ranges from sparse to dense in cover, but native species typically have very low cover. The dominant herbaceous species tend to be weedy and/or exotic; <i>Vulpia octoflora, </i><i>Bromus </i><i>tectorum, Descurainia pinnata, </i><i>Salsola tragus</i><i>, </i><i>Alyssum desertorum</i>, and <i>Halogeton glomeratus</i> are typical understory species. |
Comm #11196
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Abies lasiocarpa / Salix glauca Scree Woodland
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accession code: VB.CC.19892.ABIESLASIOCARPA
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Western Ecology Working Group of... |
0
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Comm #11197
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Sarcobatus vermiculatus Dune Shrubland
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accession code: VB.CC.32373.CEGL001364
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Western Ecology Working Group of... |
0
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This greasewood dune shrubland occurs in the mountains of Colorado and Columbia Plateau and Great Basin of Nevada and possibly Utah. 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 in dunefields, sandsheets, and stabilized dunes at 2300 to 2390 m elevation. Stands are generally on flat terrain, but slopes can be up to 17°. The majority of stands are characterized by large patches of bare soil with shrubs interspersed. Sand and bare soil dominate the ground cover, although some stands have significant cover of litter. Vegetative cover is extremely variable for this association. Total cover can range from 1-85%. <i>Sarcobatus vermiculatus</i> is always present (20-80%), typically in combination with other short shrubs such as <i>Atriplex canescens, Chrysothamnus greenei, Ericameria nauseosa</i>, and <i>Krascheninnikovia lanata</i> with cover ranging from 0-10%. Herbaceous cover is sparse, generally 20% or less. Species present in some stands with up to 5-10% cover include <i>Kochia americana, Achnatherum hymenoides, Artemisia frigida, Chenopodium leptophyllum</i>, and <i>Opuntia polyacantha</i>. |
Comm #11198
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Fouquieria splendens / Bouteloua hirsuta Shrubland
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accession code: VB.CC.33923.CEGL001377
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Western Ecology Working Group of... |
0
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This desert shrub-grassland association is known only from the Animas Mountains of southwestern New Mexico and reported from Trans-Pecos Texas. It may occur in adjacent Arizona and Mexico, but survey is needed to document it there. It occurs at about 1525 m (5000 feet) elevation on rolling hills with rocky, shallow soils. Stands are characterized by a moderate cover of grasses dominated by <i>Bouteloua hirsuta</i> in association with <i>Eragrostis intermedia</i>. Scattered, but conspicuous <i>Fouquieria splendens</i> along with <i>Prosopis glandulosa</i> typify the shrub layer. |
Comm #11199
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A.489
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accession code: VB.CC.2137.A489
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EcoArt 2002 |
0
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Comm #11200
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CEGL008647
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accession code: VB.CC.7943.CEGL008647
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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