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Key to Puget Trough Terrestrial Plant Associations


Introduction and Methods
Instructions for the Key
Names and Codes Used
Complete Species List
Association Tables
Citing This Document
Acknowledgements
References

Dominance types

Douglas-fir forests
Douglas-fir - grand fir forests
Douglas-fir - Pacific madrone forests
Douglas-fir - western hemlock - western redcedar forests
Grasslands
Lodgepole pine - Douglas-fir forests
Oregon white oak woodlands
Red alder - bigleaf maple forests
Savannas

Key to Savannas and Conifer Woodlands

  • Roemer’s fescue or California oatgrass > 5%, or long-stolon sedge + blue wildrye
    + red fescue > 25%
    • Ponderosa pine the dominant tree .............................................. PIPO/CAIN-FERO
    • Oregon white oak the dominant tree .................................................. QUGA/FERO
    • Douglas-fir the dominant tree
      • Roemer's fescue + red fescue >10% and Indian's dream or
        Rocky Mountain juniper present .......................... PSME-JUSC/FEST-ASDE
      • Roemer's fescue + red fescue <10% or Indian's dream and
        Rocky Mountain juniper absent .......................................... PSME Savanna

  • Roemer’s fescue and California oatgrass each < 5% and long-stolon sedge +
    blue wildrye + red fescue < 25% ....................................... Non-native or Douglas-fir Forest


View association table (species list for each association, in MS Excel format) for Savannas and Conifer Woodlands

Washington Natural Heritage Program - www.dnr.wa.gov/ResearchScience/Topics/NaturalHeritage/Pages/amp_nh.aspx
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Washington Dept. of Natural Resources, PO Box 47014, Olympia, WA 98504-7014