Forest Cover Type is defined here as "a descriptive classification of forestland based on present occupancy of an area by tree species." The classification is based on existing tree cover. Three criteria are recognized: the dominant cover must be of trees; the type must occupy a fairly large area in the aggregate, but not necessarily in continuous stands; and forest cover type must be based on entirely biological considerations.
Cover types are listed in Table 1 (Eastern) and Table 2 (Western) .
The 148-page publication "Forest Cover Types of the United States and Canada" is available for sale on the Society of American Foresters publications page:
http://www.safnet.org/market/storebooks.htm#policy series . The price for members is $12 US/Canada, and for nonmembers $14 US/Canada. The publication contains the descriptions, classifications, and ecological relationships of 145 types of forest. See for a table of contents.