Pseudotsuga wilsoniana
Common name: 
Taiwan Douglas-fir
soo-do-TSOO-ga wil-son-ee-AH-na
Pseudotsuga sinensis var. wilsoniana
Native to (or naturalized in) Oregon: 
  • Conifer, evergreen tree, to about 65-80 ft (20-25 m) tall, bark thick, corky, deeply fissured into scaly ridges.  Young shoots red-brown, becoming more gray; buds oval-conical, apex pointed.  Leaves flat, linear, slightly curved, to about 5 cm long and 0.15 cm wide, apex emarginate (notch), midrib grooved the entire length above, keeled with 2 stomatal bands beneath.  Cones pendant, about 6 cm long and 3 cm wide, scale nearly 3 cm wide and bract scales with reflexed tips, with long, awl-shaped middle lobes and 2 triangular, short acuminate side lobes.  Seeds winged, about 1.5-2 mm long.
  • Sun.
  • Hardy to USDA Zone 7 or lower     Native to China and Taiwan.   Now mostly considered variety of Pseudotsuga sinensis [P. s. var. wilsoniana] although it can be apparently distinguished from the type variety by its gray-green, rather that white, stomatal bands and that it is native to Taiwan, whereas the "type" in found on the mainland.
  • wilsoniana:  named by the Japanese taxonomist Bunzo Hayata in honor of E. H. Wilson ("Chinese Wilson"), a British notaable plant collector and explorer (1876-1930).  Hayata also named the so-called the Wilson's Plum Yew as Cephalotaxus wilsoniana.
  • Oregon State Univ.: a small collection in McDonald Forest on a trail off Road 540.
Click image to enlarge
  • branches with cones

    branches with cones

  • branch and cones

    branch and cones

  • leaves


  • leaves, underside

    leaves, underside

  • leaves and buds

    leaves and buds

  • cone


  • branchelets, comparison

    branchelets, comparison

  • branchlets and cones, comparison

    branchlets and cones, comparison

  • dry cones and seeds, comparison

    dry cones and seeds, comparison