Douglas-fir - ponderosa pine series
Section: tree Series Dominated by Trees
Series formation: 
Series height:<75 m
Series canopy cover:ci
Series ground layer:s
Elevation range (lower):600
(upper):   1800
Wetland information:[not available]
Upland information: Uplands:all aspects; raised stream benches and terraces. Soils granite, schist, ultra-mafic-derived.The national inventory of wet-land plants (Reed 1988) lists ponderosa pine as a FACU; Douglas-fir is not listed.
Reference:Douglas-fir and ponderosa pine ranges in CA (Griffin & Critchfield 1972); silvics (Hermann & Lavender 1990), (Oliver & Ryker 1990). Barbour (1988), Franklin (1988), Rundel et al. (1977).
Comments:The Holland description addresses only m-NorCo stands. The series is also extensive in central and eastern m-KlaR where it occurs at lower montane elevations. White fir is absent or infrequent there. Many definitions of mixed conifer would include these stands in that type. Mixed conifer forest is best thought of as a collection of series.
Plot based descriptions:Jimerson (1993) defines one association in Six Rivers National forest m-NorCo, m-KlaR, Stuart al. (1992) one association at Castle Crags St ate Park in Siskiyou Co., Taylor & Teare (1979b) in Keeler-Wolf (1990e) one association at Smoky Creek candidate RNA in Trinity Co. KlaR; Smith (1994) one association in Plumas National Forest m-CasR.; Gray (1978) reports importance values for stands in ierra and Yuba Cos. m-SN.
Series Association:Jimerson (1993): Black oak-Douglas-fir - bigleaf maple association. Stuart et al. (1992) Douglas-fir - ponderosa pine -incense-cedar association. Smith (1994): Douglas-fir - ponderosa pine - Jeffrey pine/one-sided bluegrass association [as White fir- ponderosa pine - Jeffrey pine/one-sided blue-grass association]. Taylor & Teare (1979b): Douglas-fir-ponderosa pine association.
FormationTemperate or sub-polar needle-leaved evergreen forest
Geographical associated regions: View Regions for: Douglas-fir - ponderosa pine series
Representative Image: View Representative Photograph for: Douglas-fir - ponderosa pine series
Common species: View common species for: Douglas-fir - ponderosa pine series

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