花旗松
The Douglas fir ("Pseudotsuga menziesii") is an evergreen conifer species in the pine family, Pinaceae. It is native to western North America and is also known as Douglas-fir, Douglas spruce, Oregon pine, and Columbian pine. There are three varieties: coast Douglas-fir ("P. menziesii" var. "menziesii"), Rocky Mountain Douglas-fir ("P. menziesii" var. "glauca") and Mexican Douglas fir ("P. menziesii" var. "lindleyana").