140 



TIMBKK PINE6 OF THE SOUTHERN UNITED STATES. 



As usual in conifers, tho tiaclieids are largest in the roots and smallest in tlie limbs. In these 

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

 stnnted trees, thongh very narrow rings in otherwise normal trees do not share this diminntive size 

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

 normal size.) 



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Fio. i8.— (vFOSs flection of iionnal iiiid rttuiiU-il growtli in Longleaf I'iiif. 



The following average figures illustrate the dift'ercuce between wood Ironi vi'iy stunted trees 

 and that of normal trees in Longloaf Pine, nC wliidi we give an average from an extensive series 

 examined : 



