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Description |
Comm #12031
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Pseudoroegneria spicata - Bouteloua curtipendula Herbaceous Vegetation
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accession code: VB.CC.32796.CEGL001663
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Western Ecology Working Group of... |
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This mixedgrass association ranges in size from small to large patches which are located on foothills and sideslopes along major drainages between the Tongue and Powder rivers of southeastern Montana. This type is considered a topo-edaphic climax because it occurs on moderate to steep (>45%) slopes the surfaces of which are strewn with large amounts of irregularly shaped, iron oxide porcelanite shale (scoria). The surface resulted from fires in contiguous coal beds (but the soils are conventional loams). The harsh sites of this type result in a unique depauperate community with the lowest total cover and graminoid cover of any southeastern Montana type inventoried by Hansen and Hoffman (1988). However, it still has greater cover and is more productive than those communities associated with bentonite deposits and acidic shales. <i>Pseudoroegneria spicata</i> is strongly dominant (canopy cover ranging from 40-60%) with <i>Bouteloua curtipendula</i> exhibiting less than one-fourth this value. <i>Pascopyrum smithii (= Agropyron smithii)</i> and <i>Schizachyrium scoparium</i> are consistently present with cover less than 10%. Forbs are a minor component with <i>Lygodesmia juncea, Echinacea angustifolia</i> and <i>Pediomelum argophyllum (= Psoralea argophylla)</i> having the highest fidelity to the type. |
Comm #12032
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Pseudoroegneria spicata - Bouteloua gracilis Herbaceous Vegetation
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accession code: VB.CC.36468.CEGL001664
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Mueggler, W. F., and W. L. Stewa... |
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This bluebunch wheatgrass grassland type is found in the western Plains and at low elevations in the Front Range of the Rocky Mountains. In Montana stands are found on toeslopes of the foothills and steeper slopes of valley bottoms. Soils are typically moderately deep (40-100 cm), with a variety of parent materials, and neutral in pH. Surface rock varies from 1-46%. In Montana, the vegetation is open (40-60% cover) and dominated by graminoids. <i>Pseudoroegneria spicata</i> shares dominance with <i>Hesperostipa comata (= Stipa comata)</i>. <i>Bouteloua gracilis</i> is always present, but in varying amounts depending on grazing history (increasing with heavy grazing). Associated graminoids include <i>Carex duriuscula (= Carex stenophylla), Koeleria macrantha</i>, and <i>Poa secunda (= Poa sandbergii)</i>. The most constant forbs include <i>Artemisia frigida</i> (sometimes classified as a shrub), <i>Phlox hoodii</i> and <i>Sphaeralcea coccinea</i>. Slightly more productive sites contain <i>Calamagrostis montanensis, Carex filifolia, Heterotheca villosa (= Chrysopsis villosa)</i>, and <i>Liatris punctata</i>. Shrub cover is less than 10%. Low-growing shrubs include <i>Gutierrezia sarothrae</i> and <i>Opuntia polyacantha</i>, and taller shrubs may include <i>Ericameria nauseosa (= Chrysothamnus nauseosus)</i>. |
Comm #12033
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Pseudoroegneria spicata - Carex filifolia Herbaceous Vegetation
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accession code: VB.CC.32795.CEGL001665
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Western Ecology Working Group of... |
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Stands of this association occur on level or gently sloping upland sites with loam or silt loam soils. This is an herbaceous vegetation type in which graminoids contribute most of the cover. A number of forbs may be present, but forbs and shrubs contribute little cover to the vegetation. <i>Pseudoroegneria spicata</i> dominates the vegetation, and <i>Carex filifolia</i> contributes substantial cover. Small amounts of <i>Bouteloua gracilis</i> may be present. |
Comm #12034
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Photinia melanocarpa Shrubland Alliance
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accession code: VB.CC.22899.PHOTINIAMELANOC
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Midwestern Ecology Working Group... |
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Comm #12035
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Pseudoroegneria spicata - Cushion Plants Herbaceous Vegetation
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accession code: VB.CC.32754.CEGL001666
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Western Ecology Working Group of... |
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This association is found in foothills of southwestern and south-central Montana. It is also known from the high limestone plateaus and ridges of Dinosaur National Monument in northwestern Colorado and Fossil Butte National Monument in southwestern Wyoming. In south-central Montana, this type occurs at elevations between 1250 and 1680 m (4100-5500 feet). In southwestern Montana, it has been documented from 2580 m (8450 feet) elevation but is noted in reconnaissance from 2075 to 2685 m (6800-8800 feet) elevation. In Colorado, elevations range from 1650 to 2650 m (5400-8700 feet), and in Wyoming from 2350 and 2400 m (7710-7875 feet). This community occurs on moderately deep, rocky and gravelly soils derived from limestone or calcareous sandstone of mesas, ridgetops, plateaus and saddles, and the upper slopes of outwash plains. The primary influencing environmental factor is wind; in most examples of this type, wind deflation has produced a gravel-paved surface. This herbaceous type is characterized by the presence of short-statured, compact cushion plants of the genera <i>Arenaria, Astragalus, Hymenoxys, Phlox, Cryptantha, Stenotus, Heterotheca, Eriogonum</i>, and in the Bighorn region, <i>Sphaeromeria capitata</i>. <i>Pseudoroegneria spicata</i> is present at relatively low canopy cover, although many other species of grasses may also be present. Scattered dwarfed shrubs may be scattered throughout. |
Comm #12036
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Pseudoroegneria spicata - Eriogonum heracleoides Herbaceous Vegetation
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accession code: VB.CC.32730.CEGL001668
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Western Ecology Working Group of... |
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This association is described from stands located in the upper Hells Canyon region. Similar stands are located in the Seven Devils and eastern Salmon River mountains. The association occurs on moderately steep to steep, southeast- to southwest-facing, mid to upper slopes at 1310 to 1710 m (4300-5600 feet) elevation. Soils are derived from basalt rock and colluvium. <i>Pseudoroegneria spicata - Eriogonum heracleoides</i> is the highest elevation <i>Pseudoroegneria spicata</i>-dominated plant association. <i>Eriogonum heracleoides</i> is well-represented in the open bunchgrass stands. <i>Melica bulbosa</i> is often present. Consistently associated forbs are <i>Achillea millefolium, Frasera albicaulis, Penstemon venustus</i>, and <i>Lupinus caudatus</i>. Sites are more moist and cool compared to other <i>Pseudoroegneria spicata</i>-dominated habitats. High-elevation <i>Festuca idahoensis - Pseudoroegneria spicata</i> communities are often adjacent. |
Comm #12037
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CEGL007662
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accession code: VB.CC.7272.CEGL007662
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EcoArt 2002 |
0
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Comm #12038
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CEGL007261
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accession code: VB.CC.7047.CEGL007261
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #12039
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CEGL007268
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accession code: VB.CC.7049.CEGL007268
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #12040
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CEGL007269
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accession code: VB.CC.7050.CEGL007269
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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