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Pseudoroegneria spicata - Bouteloua curtipendula Herbaceous Vegetation | Western Ecology Working Group of...
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Name: Pseudoroegneria spicata - Bouteloua curtipendula Herbaceous Vegetation Reference: Western Ecology Working Group of... Description: 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.  Accession Code: VB.CC.32796.CEGL001663 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Nov-2014 to: 01-May-2019
	status: accepted This Community's Level: association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.689936 NatureServe Explorer   Common: Bluebunch Wheatgrass - Sideoats Grama Mixedgrass Prairie   Translated: Bluebunch Wheatgrass - Sideoats Grama Herbaceous Vegetation   Scientific: Pseudoroegneria spicata - Bouteloua curtipendula Herbaceous Vegetation   Code: CEGL001663