"In this paper, Montana is divided into eight geographic subdivisions called "forest regions," based on distributions of tree and undergrowth species and the relationship of these patterns to climate and topography. The regions serve as a geographic reference for describing patterns of forest vegetation across the State. Data on the distributions of plant species and habitat types and forest zonation are presented for each region."

Relationships between live and dead crown weight and d. b. h. (ranging from 0 to 40 inches), crown length, tree height, and crown ratio are presented for 11 conifer species in the Rocky Mountains.