THE PIXE SUB-FAMILY. 105 



of eighty feet and upwards, and is frequently four or five 

 feet in diameter ; whilst as it approaches the extreme lim- 



Btl 



Fig 1 . 14. PINUS SYLVESTRIS. 



its of arborescent vegetation, it dwindles down to a mere 

 straggling shrub. 

 5* 



