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Glyceria grandis Herbaceous Vegetation | Western Ecology Working Group of...
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Name: Glyceria grandis Herbaceous Vegetation
Reference: Western Ecology Working Group of...
Description: This association most commonly occurs in the mountains of southeastern Oregon, across southern Idaho, and western Montana at elevations ranging from 1340 to 2715 m (4400-8900 feet). The association occurs in narrow to broad V-shaped valleys with 5-6% gradients. It occupies low-lying bars and streamside terraces with silty, slightly acidic soils of saturated alluvium or poorly drained Histosols, Mollisols, and Entisols. The association is also found on the margins of ponds and reservoirs, and in seasonally flooded wet meadows on floodplains of low-gradient streams, springs, sloughs, and ditches. Some occurrences are saturated season-long, while some occurrences are found adjacent to more dynamic fluvial systems that are inundated early in the season. The water table is high and is at or above the soil surface during summer. This association occurs as a very small patch (less than 0.5 acre) but can occupy as much as an entire acre. Stands are distinctively dominated by <i>Glyceria grandis</i>, up to 2 m tall, with an average cover of 30-90%. Other graminoids with high constancy and low cover include <i>Agrostis stolonifera</i> (introduced), <i>Carex athrostachya, Carex vesicaria, Juncus balticus</i>, other <i>Juncus</i> spp., and <i>Eleocharis</i> spp. A variety of forbs that tolerate saturated moisture conditions occur with low cover, including <i>Epilobium</i> spp., <i>Mimulus guttatus, Montia chamissoi, Rumex crispus</i>, and <i>Veronica americana</i>. 
Accession Code: VB.CC.33718.CEGL003429
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 17-Nov-2014 to: 01-May-2019
     
  • status: accepted
  • This Community's Level: association
  • This Community's Children: [none]
Names:   UID: ELEMENT_GLOBAL.2.684685 NatureServe ExplorerNatureServe Explorer logo
  Translated: American Mannagrass Herbaceous Vegetation
  Scientific: Glyceria grandis Herbaceous Vegetation
  Code: CEGL003429