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Pinus ponderosa - Quercus garryana / Arctostaphylos viscida / Festuca californica Woodland | Western Ecology Working Group of...
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Name: Pinus ponderosa - Quercus garryana / Arctostaphylos viscida / Festuca californica Woodland Reference: Western Ecology Working Group of... Description: This is an open woodland or savanna with widely spaced Pinus ponderosa and Quercus garryana (and rarely Quercus kelloggii or Arbutus menziesii) trees. Patches of chaparral, dominated by Ceanothus cuneatus and occasionally Arctostaphylos viscida, occur in openings. Native grasses dominate undisturbed sites, with Danthonia californica found on areas with clay soils, northern slopes, or areas with some spring moisture. Achnatherum lemmonii (= Stipa lemmonii), Festuca idahoensis, and Pseudoroegneria spicata all can be found in drier or better drained sites, while Festuca californica and Melica geyeri are the dominant species in the shade. Toxicodendron diversilobum is found as a shrub and vine throughout these areas. This woodland association requires periodic fire to maintain its woodland character at most sites. Without fire, these woodlands first become forests of oak and pine, and eventually support Douglas-fir forests. If fire is excluded for long enough, they become a closed canopy mix of young Ponderosa pine, white oak, black oak and decadent chaparral, which burns explosively if exposed to a wildfire. In areas which are heavily grazed, introduced annual grasses (Cynosurus echinatus, Taeniatherum caput-medusae, Bromus spp.) and noxious weeds (Centaurea solstitialis) replace the native grasses and forbs as understory dominants. Most examples of this association are found on valley bottomlands, with alluvial or clay soils of volcanic origin. However, in southwestern Oregon and northwestern California, occasional examples can be found on alluvial deposits in serpentine areas.  Accession Code: VB.CC.27176.PINUSPONDEROSAQ Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 17-Nov-2014
	status: accepted Community's Parent: Pinus ponderosa - Quercus garryana Woodland Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Ponderosa Pine - Oregon White Oak / Whiteleaf Manzanita / California Fescue Woodland   UID: ELEMENT_GLOBAL.2.689097 NatureServe Explorer   Code: CEGL000880   Scientific: Pinus ponderosa - Quercus garryana / Arctostaphylos viscida / Festuca californica Woodland (convergence) and Synonyms: (undetermined) Pinus ponderosa - Quercus garryana / Arctostaphylos viscida / Festuca californica Woodland