The ponderosa is one of the most widely distributed American species of this conifer
The coniferous species of these forests are Douglas-fir, white fir, blue 
spruce,... [DOC] [TLE] Modeling the occurrence of 15 coniferous tree species throughout ... [PAR] growth for one widely distributed species, and then relate these responses to .... 
ports some of the most productive forest in North America .... Pinus ponderosa.