This excerpt taken from the WY 10-K filed Feb 27, 2009.
Our Western timberlands are composed primarily of Douglas fir, a species highly valued for its structural strength. We also have large volumes of western hemlock along the coastal areas to serve the whitewood markets. Our Southern timberlands are predominantly southern yellow pine, which provide grade logs to wood products facilities and chips and fiber logs to pulp and paper operations. Both regions have minor volumes of various hardwood species.