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A.1243 | EcoArt 2002
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Name: A.1243
Reference: EcoArt 2002
Description: This vegetation occurs on shifting sands of outer coastal dunes at sea level. The climate is strongly maritime with many cloudy or foggy days and mild temperatures. Onshore winds typically transport abundant salt spray and sand. Soils are entirely aeolian sands without horizon development or accumulated organic material. In the Pacific Northwest, this alliance is dominated by medium-tall graminoids, which range in cover from dense to very open (down to 10% cover). The sand substrate is usually visible, and litter accumulation from plant debris is insignificant. ~Leymus mollis ssp. mollis$ usually dominates the stands, but associated species may be abundant or even codominant; ~Abronia latifolia, Calystegia soldanella, Ambrosia chamissonis$, and ~Cakile$ spp. are the most common. Sparsely scattered shrubs and trees may also occur, particularly near the landward edge, including ~Gaultheria shallon, Arctostaphylos uva-ursi, Arctostaphylos columbiana, Salix hookeriana, Ledum glandulosum, Lonicera involucrata$, and ~Pinus contorta$. Contiguous vegetation types are usually sparse ~Abronia - Cakile$ strand communities or bare sand at the seaward margin and ~Gaultheria - Salix - Arctostaphylos$ inner dune shrub communities at the landward edge. This vegetation may alternate with non-native ~Ammophila arenaria$ dunegrass communities along the outer dune front. 
Accession Code: VB.CC.1009.A1243
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: V.A.5.N.c
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: LEYMUS MOLLIS HERBACEOUS ALLIANCE
  Code: A.1243
  Common: Sea Lyme Grass Herbaceous Alliance
(convergence) and Synonyms:
(undetermined) Leymus mollis Herbaceous Alliance