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Fraxinus latifolia Seasonally Flooded Forest Alliance | Western Ecology Working Group of...
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Name: Fraxinus latifolia Seasonally Flooded Forest Alliance Reference: Western Ecology Working Group of... Description: These communities occur in low-elevation (0-500 m) wetland habitats of the Puget Trough and Willamette Valley of western Oregon and Washington, typically in poorly drained swales or riparian areas. Flooding occurs in much of the winter, spring, and occasionally into early summer. Scour associated with flooding is common, but not necessary to maintain these communities. These are the typical forests of older fluvial sites, such as oxbow lakes. Soils are usually silts or clays with poor drainage and gleying is evident. These forests are dominated by Fraxinus latifolia in the tree canopy, usually as the only tree species. Towards the drier edges of a stand, Acer macrophyllum or Quercus garryana may occur in small amounts. In stands near active stream channels with mineral soils, Alnus rubra, Alnus rhombifolia, Populus balsamifera ssp. trichocarpa, and Salix spp. may be common. Understory shrubs are not common, but when present species may include Crataegus douglasii, Spiraea douglasii, Symphoricarpos albus, Rosa eglanteria, and Rubus ursinus. The herbaceous layer is dominated by the perennial graminoid Carex obnupta; other graminoids that may be present include Carex deweyana, Carex unilateralis, Carex ovalis (= Carex leporina), and Eleocharis acicularis. Common forbs include Galium trifidum, Galium aparine, Ranunculus uncinatus, Veronica spp., and Geum macrophyllum. Adjacent vegetation is most often upland forest of Quercus garryana and wet prairie dominated by Deschampsia caespitosa and/or Hordeum brachyantherum.  Accession Code: VB.CC.22707.FRAXINUSLATIFOL 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 latifolia Seasonally Flooded Forest Alliance   Translated: Oregon Ash Seasonally Flooded Forest Alliance   UID: HIGHER_CLASS_UNIT.2.124775 NatureServe Explorer   Code: A.343