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A.1127 | EcoArt 2002
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Name: A.1127
Reference: EcoArt 2002
Description: This dwarf-shrub alliance is reported from the Pryor Mountains in the northern portion of the Bighorn Basin of south-central Montana and dissected uplands of the Cheyenne River Basin in northeastern Wyoming. Stands typically occur in slight depressions on alluvial fans and terraces, dissected outwash or rolling plains, lower foothills, and badlands. Sites are flat to moderately steep often highly eroded slopes with southern or western aspects. Soils are deep, poorly drained, and typically alkaline and saline with silt-loam to clay texture. The soil surface is mostly bare ground. Substrate is derived from shale or sandstone interbedded with shale, claystone or clay. The vegetation is characterized by a moderately dense dwarf-shrub layer that is dominated by ~Artemisia pedatifida$. ~Atriplex gardneri$ may codominate in some stands. Other woody species may include scattered ~Artemisia tridentata, Atriplex confertifolia, Ericameria nauseosa (= Chrysothamnus nauseosus), Eriogonum pauciflorum, Krascheninnikovia lanata, Gutierrezia sarothrae$, or ~Suaeda moquinii (= Suaeda nigra)$. The moderately sparse herbaceous layer is often dominated by cool-season graminoids such as ~Pascopyrum smithii$ or ~Elymus elymoides$ with lesser amounts of ~Bouteloua gracilis, Carex filifolia, Elymus lanceolatus ssp. lanceolatus, Poa secunda (= Poa juncifolia)$, or ~Pseudoroegneria spicata$. Forbs are generally sparse and may include scattered ~Allium textile, Astragalus$ spp., ~Comandra umbellata, Machaeranthera tanacetifolia, Musineon divaricatum, Phlox hoodii, Platyschkuhria integrifolia, Vicia americana, Xylorhiza glabriuscula$, or the cactus ~Opuntia polyacantha$. Annual grasses and forbs are seasonally present. Diagnostic of this alliance is the dwarf-shrub layer dominated by ~Artemisia pedatifida$. 
Accession Code: VB.CC.899.A1127
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: 17-Mar-2005
     
  • status: accepted
  • Community's Parent: III.B.3.N.a
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Code: A.1127
  Scientific: ARTEMISIA PEDATIFIDA SHRUBLAND ALLIANCE
  Common: Birdfoot Sagebrush Shrubland Alliance
(convergence) and Synonyms:
(undetermined) Artemisia pedatifida Shrubland Alliance