"Douglas fir United States." . . . . "United States. Forest Service." . . . . . . . . . "Douglas-Fir : [(Pseudotsuga menziesii (Mirb,)Franco)]" . . . . . "Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)"@en . . . . "Douglas-fir"@en . . "Douglas fir." . . "United States." . .