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Name
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Reference
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Plots↓
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Description |
Comm #11201
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CEGL004496
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accession code: VB.CC.6046.CEGL004496
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11202
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Bouteloua eriopoda - Bouteloua trifida Herbaceous Vegetation
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accession code: VB.CC.25462.BOUTELOUAERIOPO
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Western Ecology Working Group of... |
0
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Comm #11203
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Cassiope mertensiana / Carex paysonis Dwarf-shrubland
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accession code: VB.CC.34026.CEGL001396
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Western Ecology Working Group of... |
0
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This uncommon association has been documented from only southwestern Montana within the alpine of the Anaconda-Pintlar and Tobacco Root mountains; it is highly likely that it occurs in the East Pioneer Range as well. Documented sites occur at the base of gentle north- or east-facing slope at 2870-2960 m (9400-9700 feet). These landscape positions (snowbed sites) accumulate deep snowdrifts, and the release of this load comes late, with soils remaining saturated well into the growing season. Sites often show signs of frost churning and solifluction, suggesting they receive additional upslope moisture. Soils are derived from acidic parent materials and show a moderately acidic reaction (pH 4.8-6.2). Dwarf-shrub canopy cover averages 60% and is dominated by <i>Cassiope mertensiana</i> and <i>Salix arctica</i> (or <i>Salix reticulata</i>) with <i>Phyllodoce glanduliflora</i> occasionally present. Graminoid cover is highly variable, averaging 23%; <i>Carex paysonis</i> is 100% constant and its cover consistently ranges between 7 and 25%. Other graminoids with the potential to codominate include <i>Carex scirpoidea, Carex nigricans</i> and <i>Poa secunda (= Poa sandbergii</i>) with <i>Poa alpina</i> and <i>Festuca brachyphylla (= Festuca ovina)</i> evidencing just high constancy. Average forb cover is 30% with <i>Potentilla diversifolia</i> and <i>Geum rossii</i> usually dominating this component; other high-constancy forbs include <i>Minuartia obtusiloba, Polygonum bistortoides, Erigeron simplex</i>, and <i>Synthyris pinnatifida</i>. This association constitutes one portion of a common mosaic that can include <i>~Juncus drummondii - Antennaria lanata</i> Herbaceous Vegetation (CEGL001904)$$, <i>~Salix arctica - (Salix petrophila, Salix nivalis) / Polygonum bistortoides</i> Dwarf-shrubland (CEGL001431)$$, <i>~Carex scirpoidea - Geum rossii</i> Herbaceous Vegetation (CEGL001866)$$, and <i>~Carex nigricans</i> Herbaceous Vegetation (CEGL001816)$$. |
Comm #11204
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Abies magnifica - Abies concolor - Pinus lambertiana / Sparse Understory Forest
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accession code: VB.CC.25648.ABIESMAGNIFICAA
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Western Ecology Working Group of... |
0
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Comm #11205
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Open Pavement Sparsely Vegetated Alliance
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accession code: VB.CC.19403.OPENPAVEMENTSPA
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Midwestern Ecology Working Group... |
0
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This is technically not an alliance. It is a placeholder for a group of sparsely vegetated associations that do not have adequate vegetation descriptions, but do share certain substrate characteristics. |
Comm #11206
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Phyllodoce empetriformis / Antennaria lanata Dwarf-shrubland
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accession code: VB.CC.33270.CEGL001405
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Western Ecology Working Group of... |
0
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This association is an alpine snowbed type documented to occur on crystalline substrates in the mountain ranges of southwestern and northwestern Montana. In southwestern Montana it is associated with the ranges (Anaconda-Pintlar, Madison, East Pioneer) receiving greater precipitation than other ranges of this region. In southwestern Montana this vegetation is locally common as small patches on depressions and protected slopes of gentle to moderate inclination occurring at 2800-3080 m (9200-10,100 feet) elevation. Based on reconnaissance information for northwestern Montana and the Bitterroot Range, this association occurs within the upper subalpine zone, as well as alpine habitats. Sites are snow covered in winter, and meltoff probably occurs relatively late in the growing season, though not so late as in the ~<i>Carex nigricans</i> Herbaceous Vegetation (CEGL001816)$$. Dwarf-shrubs provide the dominant aspect with a mean cover of 55%. <i>Phyllodoce empetriformis</i> is diagnostic and generally dominant with the other dwarf-shrubs, <i>Vaccinium scoparium, Phyllodoce glanduliflora</i>, and <i>Cassiope mertensiana</i>, being common and occasionally codominant. Mean graminoid canopy cover is low (20%) and characterized by high constancy for <i>Carex paysonis, Juncus drummondii</i>, and <i>Poa secunda (= Poa sandbergii)</i>. Forbs averaged 35% cover; <i>Antennaria lanata, Polygonum bistortoides</i>, and <i>Sibbaldia procumbens</i> are consistently present, though only <i>Antennaria lanata</i> occurs with greater than 5% cover. This association often occurs in a matrix with other snowbed types (e.g., ~<i>Juncus drummondii - Antennaria lanata</i> Herbaceous Vegetation (CEGL001904)$$, ~<i>Carex nigricans</i> Herbaceous Vegetation (CEGL001816)$$, ~<i>Cassiope mertensiana / Carex paysonis</i> Dwarf-shrubland (CEGL001396)$$) and moist turf types (e.g., ~<i>Carex scirpoidea - Geum rossii</i> Herbaceous Vegetation (CEGL001866)$$). |
Comm #11207
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Phyllodoce empetriformis / Lupinus latifolius Dwarf-shrubland
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accession code: VB.CC.33203.CEGL001406
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Western Ecology Working Group of... |
0
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Comm #11208
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Phyllodoce empetriformis / Vaccinium deliciosum Dwarf-shrubland
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accession code: VB.CC.33202.CEGL001407
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Western Ecology Working Group of... |
0
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Comm #11209
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Artemisia arbuscula ssp. longiloba Shrubland
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accession code: VB.CC.33929.CEGL001414
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Western Ecology Working Group of... |
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This alkali sagebrush shrubland is known from Fossil Butte National Monument in southwestern Wyoming and Jarbridge Mountains in northeastern Nevada but likely is more widespread. In the southern portion of the monument in Wyoming, it is distributed as large patches or stands on fine-textured alkaline soils on slopes, valley floors, interfluves, drainages and ridges, on gentle (1- to 10-degree) slopes oriented to all aspects, except northern, between 2030 and 2374 m elevation. The unvegetated surface has low to high exposure of bare soil, low to high cover of small and large rocks, litter, and downed wood. Soils are moderately well-drained to rapidly drained and texturally are clay loam or clay. The vegetation is characterized by a sparse to moderate short-shrub layer dominated by <i>Artemisia arbuscula ssp. longiloba</i> (4-40% cover) without a significant understory. This association also includes sparsely vegetated stands as total vegetation cover ranges from 8-75%. The shrub layer includes other short and dwarf-shrubs, such as <i>Amelanchier utahensis, Artemisia tridentata ssp. tridentata, Atriplex gardneri, Chrysothamnus viscidiflorus, Ericameria nauseosa, Krascheninnikovia lanata</i>, or <i>Symphoricarpos oreophilus</i>, that provide sparse cover. If present, the herbaceous cover is sparse and variable with scattered grasses and forbs. |
Comm #11210
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Tiquilia hispidissima / Sporobolus nealleyi Dwarf-shrubland
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accession code: VB.CC.32439.CEGL001546
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Western Ecology Working Group of... |
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This association is primarily associated with secondary (alluvial deposited) gypsum outcrops that commonly occur as small patches in the bottoms of arid, alluvial basins in southern New Mexico (northern Chihuahuan Desert). This is a low-elevation type ranging from 1070 to 1525 m (3500-5000 feet) but occasionally extending up to 1980 m (6500 feet) on hillslope outcrops of southerly aspects. It is associated with hot and dry environments of gypsiorthid soils, and hence vegetation cover is usually sparse. <i>Sporobolus nealleyi</i> and <i>Tiquilia hispidissima</i> dominate, often in association with other gypsophillic species such as <i>Calylophus hartwegii</i> and <i>Selinocarpus lanceolatus</i> (although forb diversity is generally low). Non-gypsophillic shrubs are sometimes common such as <i>Atriplex canescens, Gutierrezia sarothrae</i>, and <i>Ephedra torreyana</i>. |
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