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A.629 | EcoArt 2002
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Name: A.629
Reference: EcoArt 2002
Description: This alliance is found along streams and rivers and in draws and canyons across much of the northern Great Plains. Stands often have an overstory that is more dense than typical woodland physiognomy. The canopy can be moderately closed to closed. Most of the canopy trees are 6-10 m tall, and they allow significant light to penetrate to the understory. The shrub layer is usually well-developed while the herbaceous layer is moderately to well-developed. The canopy is dominated by ~Fraxinus pennsylvanica$ and sometimes ~Ulmus americana$. Individuals of ~Populus deltoides$ and ~Acer negundo$ are often scattered throughout. The shrub layer is typically dominated by ~Prunus virginiana, Symphoricarpos occidentalis, Symphoricarpos albus$, and ~Ribes$ spp. The herbaceous layer often contains ~Maianthemum stellatum, Galium aparine$, and ~Elymus canadensis$. ^Stands of this alliance are usually on flat to moderately steep slopes near permanent or ephemeral streams. Rarely, it can be found on steep north-facing escarpments. These sites create more mesic microclimates in which the woodland can develop in landscapes otherwise dominated by grasslands. The soils are typically deep and loamy, but in places they can be rocky. Stands are common along riparian areas but are usually distant enough from larger streams that they do not flood or do so for very short periods. 
Accession Code: VB.CC.2270.A629
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: II.B.2.N.a
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: FRAXINUS PENNSYLVANICA - (ULMUS AMERICANA) WOODLAND ALLIANCE
  Code: A.629
  Common: Green Ash - (American Elm) Woodland Alliance
(convergence) and Synonyms:
(undetermined) Fraxinus pennsylvanica - (Ulmus americana) Woodland Alliance