The ponderosa is one of the most widely distributed American species of this conifer
[DOC] [TLE] Ponderosa Pine (Pinus ponderosa) - Forest Research and Outreach [PAR] ... known as the yellow pine, is one of the most widely distributed tree species in 
the West, ... One band of relatively pure ponderosa pine stands occurs along this 
transition ... pure stands while higher up it grows mixed with other conifer species
.