IfiO 



TIMHEK PINES OK THE SOUT1IEKN UNITKU STATES. 



As usual in conifers, the tracheids are largest in the roots aiid smallest in the limbs. In these 

 pines, especially in Lougleaf Pine, they are larger in well-grown wood than in that of extremely 

 stunted trees, though very narrow rings in otherwise uormal trees do not share this diminutive size 

 of the tracheid. (See fig. 18, A and B, where a few very narrow rings are made up of elements of 

 normal size.) 



A 



Flo. 18.-Crt>88 section of normal nnd stunli .1 growth in Lmigleaf Pin.-. 



The following average figures illustrate the difference bttween wood from very stunted trees 

 and that of normal trees in Longleaf Pine, of which we give an average from an extensive series 

 examined : 



