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Polygonum spp. - Echinochloa spp. Temporarily Flooded Herbaceous Alliance | Midwestern Ecology Working Group...
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Name: Polygonum spp. - Echinochloa spp. Temporarily Flooded Herbaceous Alliance
Reference: Midwestern Ecology Working Group...
Description: This alliance, found in the southern Great Plains, occurs in temporarily flooded playa lakebeds. Annual herbaceous graminoids and forbs mostly less than 1 m tall dominate the exposed mud flats of this alliance. Species composition and extent of stands vary from year to year. Coreopsis tinctoria, Echinochloa spp., Eleocharis engelmannii, Lindernia dubia, Polygonum spp., and Rumex stenophyllus are typical species of this alliance. In sites which have been modified to hold water longer, i.e., drainage ditches and re-use pits, perennials such as Eleocharis palustris and Marsilea vestita may dominate. The frequent water fluctuations and thick clay pan prevent establishment of most perennial hydrophytes typical of pond marshes. Stands of this alliance occur in shallow depressions in nearly level ground. Soils are silty clay loam underlain by a clay pan. These areas are temporarily or sometimes seasonally flooded by ponded rainwater and surface runoff. Sites dry out by mid to late summer in all but the wettest years. 
Accession Code: VB.CC.26837.POLYGONUMSPPECH
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: Polygonum spp. - Echinochloa spp. Temporarily Flooded Herbaceous Alliance
  Translated: Smartweed species - Barnyard Grass species Temporarily Flooded Herbaceous Alliance
  UID: HIGHER_CLASS_UNIT.2.125800 NatureServe ExplorerNatureServe Explorer logo
  Code: A.1348