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Fraxinus pennsylvanica - (Ulmus americana) / Symphoricarpos occidentalis Floodplain Forest | NatureServe Biotics 2019
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Name: Fraxinus pennsylvanica - (Ulmus americana) / Symphoricarpos occidentalis Floodplain Forest Reference: NatureServe Biotics 2019 Description: This ash - elm forest type is found in the northeastern Great Plains of the United States and Canada. Stands are found on nearly level floodplains and lower terraces of rivers and streams, generally away from the river on older, stabilized sites. The water table may be relatively deep on higher terraces, allowing drier species to establish. Soils are typically clays or silty clays. The tree layer is variable in structure, ranging from open (25-50%) to closed (50% or more) canopy. <i>Fraxinus pennsylvanica</i> is the leading dominant. In some parts of the range <i>Juniperus scopulorum</i> is present in the subcanopy, particularly where the canopy is still open. <i>Populus deltoides</i> may be present as an emergent. Emergent <i>Populus deltoides</i> may also occur under a canopy of <i>Fraxinus pennsylvanica</i>, reflecting a successional shift in some stands. <i>Fraxinus pennsylvanica</i> is common in the subcanopy and sapling layer, and, in some stands, <i>Ulmus americana</i> may be an associate. <i>Acer negundo</i> may only be occasionally present in some parts of the range. The dominant shrub is <i>Symphoricarpos occidentalis</i>. Other shrub species may be present, including <i>Cornus sericea, Rosa woodsii</i>, and <i>Rhus aromatica</i>. A variety of herbs may be present, none at high cover values, including <i>Elymus canadensis, Maianthemum stellatum, Melilotus officinalis, Muhlenbergia racemosa, Parthenocissus vitacea, Poa pratensis, Thalictrum dasycarpum</i>, and <i>Toxicodendron rydbergii</i>.  Accession Code: urn:lsid:vegbank.org:commConcept:30997-{7B5A6554-8D16-4F45-8CEF-35739A9F1101} Plot-observations of this Community Concept: 5
	Party Perspective according to: NatureServe (organization) Perspective from: 24-Aug-1999 to: ongoing
	status: accepted Community's Parent: Fraxinus pennsylvanica - Ulmus americana - Populus deltoides Floodplain Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.683094 NatureServe Explorer   Code: CEGL002088   Translated: Green Ash - (American Elm) / Western Snowberry Floodplain Forest   Common: Great Plains Ash - Elm / Snowberry Floodplain Forest   Scientific: Fraxinus pennsylvanica - (Ulmus americana) / Symphoricarpos occidentalis Floodplain Forest (convergence) and Synonyms: (similar) CEGL002088 (similar) Fraxinus pennsylvanica - (Ulmus americana) / Symphoricarpos occidentalis Forest (similar) Fraxinus pennsylvanica - (Ulmus americana) / Symphoricarpos occidentalis Forest