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  • Ponderosa pine of the Willamette Valley, Western Oregon 

    Hibbs, D.E.; Wilson, M.V.; Bower, A.L. (WSU Press, 2002)
    Ponderosa pine (Pinus ponderosa) is an overlooked component of the historical vegetation in the Willamette Valley of western Oregon, USA. Pollen, historical, and field data show that ponderosa pine has been a component of ...