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: a very tall evergreen tree that grows in the western U.S.
Full Definition of DOUGLAS FIR
: any of a genus (Pseudotsuga) of tall evergreen timber trees of the pine family having thick bark, pitchy wood, and pendulous cones; especially: one (P. menziesii syn. P. taxifolia) chiefly of the western United States — see cone illustration
Cone of a Douglas fir (Pseudotsuga menziesii)—Grant Heilman Photography
Any of about six species of coniferous evergreen timber trees (seeconifer) that make up the genus Pseudotsuga, in the pine family, native to western North America and eastern Asia. Long, flat, spirally arranged yellow- or blue-green needles grow directly from the branch. The North American tree commonly called Douglas fir is P. menziesii (sometimes P. douglasii). Douglas firs may grow to 250 ft (75 m) tall and 8 ft (2.4 m) in diameter. One of the best timber trees in North America, it is also a popular ornamental and Christmas tree and is used for reforestation along the Pacific Coast.