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Pseudoroegneria spicata - Bouteloua curtipendula Grassland | NatureServe Biotics 2019
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Name: Pseudoroegneria spicata - Bouteloua curtipendula Grassland Reference: NatureServe Biotics 2019 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 (&gt;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</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</i> having the highest fidelity to the type.  Accession Code: urn:lsid:vegbank.org:commConcept:30572-{B057F6F8-BFB3-4520-994A-CBA5FC1EE103} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: ongoing
	status: accepted Community's Parent: Pseudoroegneria spicata - Pascopyrum smithii - Hesperostipa comata Grassland Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.689936 NatureServe Explorer   Code: CEGL001663   Translated: Bluebunch Wheatgrass - Sideoats Grama Grassland   Common: Bluebunch Wheatgrass - Sideoats Grama Mixedgrass Prairie   Scientific: Pseudoroegneria spicata - Bouteloua curtipendula Grassland (convergence) and Synonyms: (similar) Pseudoroegneria spicata - Bouteloua curtipendula Herbaceous Vegetation (similar) Pseudoroegneria spicata - Bouteloua curtipendula Herbaceous Vegetation (similar) CEGL001663