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Rhizocarpon geographicum - Umbilicaria hyperborea Eastern Alpine Fell-field Alliance | NatureServe Biotics 2019
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Name: Rhizocarpon geographicum - Umbilicaria hyperborea Eastern Alpine Fell-field Alliance
Reference: NatureServe Biotics 2019
Description: This alliance occurs at high elevations on Northern Appalachian and eastern Canadian summits. Serpentine mountains often develop fell-fields. Sites are near or above treeline and are generally windswept and exposed to high solar radiation. Lichens are the dominant vegetation; vascular plants may occur in very sparse abundance, confined to sheltered crevices. Typically, the rock surfaces are covered with various lichen species, including <i>Rhizocarpon geographicum, Arctoparmelia centrifuga</i>, and <i>Umbilicaria hyperborea</i>. Various dwarf-shrubs and herbs may occur in sheltered areas, and where soil areas are more extensive, dwarf-shrub heath types may be found. Patterned ground caused by frost action is common, with rocks sorting by size classes in polygons, in flat areas, or in stripes, on slopes. 
Accession Code: urn:lsid:vegbank.org:commConcept:39213-{2A03CBA7-7AA8-42D3-9305-A06F84020B4B}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Sep-2014 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.900054 NatureServe ExplorerNatureServe Explorer logo
  Code: A4003
  Translated: World Map Lichen - Blistered Rocktripe Lichen Eastern Alpine Fell-field Alliance
  Common: Eastern Alpine Fell-field
  Scientific: Rhizocarpon geographicum - Umbilicaria hyperborea Eastern Alpine Fell-field Alliance