USDA Forest Service
 

 
 
Pacific Northwest Research Station Publications
   
Evaluate Our Service
Your comments and suggestions are very important to our service improvement.

Pacific Northwest Research Station
333 SW First Avenue
Portland, OR 97204

(503) 808-2592

Pacific Northwest Research Station logo.

United States Department of Agriculture Forest Service.

 

 

Aspen in the Fall.The forests of these three states are richly varied. They are forests of different colors--the gray bark of Douglas-fir, cinnamon-orange bark of ponderosa pine, white bark of aspen, and dark-colored bark of black spruce. Conifers such as fir, spruce, and pine have needles in different shades of green or blue-green. Larch needles and aspen leaves turn bright gold in the fall.

Forests have trees of different ages and sizes. Some tree seeds are small enough to hold several on your fingertip. The largest Douglas-fir ever found weighed about 175 tons and was nearly 300 feet tall when it died, and it grew from one of those tiny seeds.

Over the past 75 years, scientists at the Pacific Northwest Research Station have learned much about the forests of Alaska, Oregon, and Washington.

 

Douglas-Fir Forest - Old mature stage
Ponderosa Pine Forest - Old mature stage

 

Alaska map.

 

 

 

Map of Oregon and Washington. Areas in Oregon with at least 25 percent tree canopy cover. Areas in Washington with a least 25 percent tree canopy cover.

 

 

 

Areas in Oregon and Washington with at least 25-percent tree canopy cover.

 

 

USDA Forest Service - Pacific Northwest Research Station
Last Modified: Monday, 16 December 2013 at 14:18:41 CST


USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.