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Heracleum maximum Temporarily Flooded Herbaceous Alliance | Western Ecology Working Group of...
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Name: Heracleum maximum Temporarily Flooded Herbaceous Alliance
Reference: Western Ecology Working Group of...
Description: This alliance occurs in subalpine meadows in the mountains of western Wyoming. Elevations range from 1970-2720 m, and sites are moist, often concave, lower slopes and benches that temporarily flood or are saturated from snowmelt and remain moist most of the growing season. Slopes are generally moderately steep, up to 40%. Substrate is clay loam or clay soils with relatively high organic matter and therefore good water-holding capacity. Parent material may include sandstone, limestone, shale and quartzite. Stands have a dense (nearly 100% cover) herbaceous layer that is dominated by perennial forbs, typically Heracleum maximum, but codominants include Rudbeckia occidentalis and Thalictrum fendleri. Other frequent forb associates include Delphinium X occidentale, Geranium viscosissimum, Agastache urticifolia, Symphyotrichum foliaceum (= Aster foliaceus), and Lupinus argenteus. Graminoids are sparse. The most common are Elymus trachycaulus, Bromus carinatus, Melica spectabilis, and Elymus glaucus. 
Accession Code: VB.CC.26843.HERACLEUMMAXIMU
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: 01-May-2019
     
  • status: accepted
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: Heracleum maximum Temporarily Flooded Herbaceous Alliance
  Translated: Cow-parsnip Temporarily Flooded Herbaceous Alliance
  UID: HIGHER_CLASS_UNIT.2.126537 NatureServe ExplorerNatureServe Explorer logo
  Code: A.1661