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Populus angustifolia / Crataegus rivularis Woodland | Western Ecology Working Group of...
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Name: Populus angustifolia / Crataegus rivularis Woodland
Reference: Western Ecology Working Group of...
Description: This riparian woodland association is found on the lower slopes (2400-2500 m) of the San Juan Mountains and along wide, sinuous tributaries of the San Miguel and Yampa rivers in Colorado. Stands occur away from the main channel along dry back channels or ephemeral streams in sandy clay soils. This deciduous woodland is characterized by mature Populus angustifolia trees (20-57% cover) in the overstory and dense stands of Crataegus rivularis (10-70% cover) in the understory. Tree canopy often includes other species such as Pinus ponderosa, Quercus gambelii, and Pseudotsuga menziesii. The shrub canopy is usually diverse, with no single species codominant in all stands. Common shrubs include Rosa woodsii, Cornus sericea, Symphoricarpos rotundifolius, and several Salix species, including Salix bebbiana, Salix ligulifolia (= Salix eriocephala var. ligulifolia), and Salix monticola. Forb and graminoid cover is minimal due to dry soil conditions. Despite its presence on dry soils, the community is dependent upon flood/scouring events for seedling establishment of Populus angustifolia. 
Accession Code: VB.CC.20822.POPULUSANGUSTIF
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 09-Apr-1998 to: 17-Nov-2014
      Names:   Translated: Narrowleaf Cottonwood / River Hawthorn Woodland
  UID: ELEMENT_GLOBAL.2.684957 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL002644
  Scientific: Populus angustifolia / Crataegus rivularis Woodland
(convergence) and Synonyms:
(undetermined) Populus angustifolia / Crataegus rivularis Woodland