JACK PINE. 



17 



YEAR5 



Fig 4.— JacJi pme saplings 8 years old and 10 feet high. Paper tied around nodes indicates termination 

 of esch successive year's gro\rth, and shows several whorls of lateral branches (usually 3) for each year, 

 which is characteristic of this species. 



140205°— 20— Bull. 820 3 



