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Pinus flexilis / Grass Understory Central Rocky Mountain Woodland Alliance | NatureServe Biotics 2019
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Name: Pinus flexilis / Grass Understory Central Rocky Mountain Woodland Alliance
Reference: NatureServe Biotics 2019
Description: This foothill and outcrop woodland alliance occurs along the eastern slope of the central and northern Rocky Mountains and on escarpments in the northwestern Great Plains. Stands have an open canopy dominated by <i>Pinus flexilis</i> and may be codominated by <i>Juniperus scopulorum</i> or, less commonly, <i>Juniperus osteosperma</i>. The understory is characterized by moderately dense to low herbaceous cover, typically perennial grasses. If shrubs are present, then cover is low (&lt;10%) and perennial grass cover exceeds shrub cover. The most common species are graminoids such as <i>Achnatherum hymenoides, Bouteloua gracilis, Calamagrostis purpurascens, Carex rossii, Festuca campestris, Festuca idahoensis, Koeleria macrantha, Leucopoa kingii</i>, and <i>Pseudoroegneria spicata</i>. Scattered forbs are typically present. Stands range from lower montane and foothill zones down to geographic breaks in the plains. Elevations range from 850-2400 m. Sites are typically xeric on exposed, windswept rocky slopes and ridges from montane to foothills and prairie breaks. These open woodlands occur on all aspects, but are most common on dry south- and west-facing slopes. Soils are typically shallow, skeletal and coarse-textured, such as gravelly, sandy loams or loams, but may include alkaline clays. The parent material is commonly limestone or sandstone. Exposed bedrock is common and many stands have over 50% bare soil. Although sites may be rocky, they usually have some soil development that supports moderate grass cover. 
Accession Code: urn:lsid:vegbank.org:commConcept:38711-{5FAC88E2-71BB-4794-A4BD-30B63FECD3AD}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 08-Jan-2014 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.899548 NatureServe ExplorerNatureServe Explorer logo
  Code: A3425
  Translated: Limber Pine / Grass Understory Central Rocky Mountain Woodland Alliance
  Common: Central Rocky Mountain Limber Pine / Grass Woodland
  Scientific: Pinus flexilis / Grass Understory Central Rocky Mountain Woodland Alliance