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Fraxinus pennsylvanica - (Ulmus americana) Woodland Alliance | Midwestern Ecology Working Group...
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Name: Fraxinus pennsylvanica - (Ulmus americana) Woodland Alliance Reference: Midwestern Ecology Working Group... 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.27613.FRAXINUSPENNSYL 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: Fraxinus pennsylvanica - (Ulmus americana) Woodland Alliance   Translated: Green Ash - (American Elm) Woodland Alliance   UID: HIGHER_CLASS_UNIT.2.124868 NatureServe Explorer   Code: A.629