Figure 8. — Branch ends of 

 ponderosa pine trees are 

 heavily laden with cones 

 during years of heavy 



Table 2. --Mean yields of ponderosa pine cones and seeds from a very heavy crop, 1926, 



in central Idaho 1 







:Cones per 



Cones per 



Seeds per 



Seeds per 



Fanned seed 



Tree 



: Altitude: 



Age : 



tree 



bushel 



cone 



tree : 



per pound 





Feet 



Years 













Immature, stand 



4,000 



46 



300 



302 



M 



19,700 



8,575 



Immature, stand 



5,500 



38 



222 



251 



77 



16,100 



8,050 



Immature, isolated 



4,000 



42 



586 



267 



80 



43,000 



8,200 



Immature, isolated 



5,500 



36 



368 



281 



74 



24,500 



8,450 



Mature, scattered 



4,500 



150+ 



1,407 



268 



71 



101,000 



8,350 



Mature, scattered 



5,500 



150 + 



1,409 



227 



92 



118,300 



8,875 



From Annual Investigative Report 1936-37, U.S. For. Serv. , Intermt. For. £ Range 

 Exp. Stn. 



14 



