CA03S SCr/Oft 



ffad ' (of , 



Jail UN, J 



UB i_ "! " 



rind (r i 

 LONG/T UDI NAL 3CCT/OM 



FIG. 81. Oak branch in cross, tangential, and longitudinal section : cork 

 (cfc), cork cambium (cr), parenchyma (cor. p.), stereome {sir), bast (6p), 

 sieve-plate (sp), sieve-tube (st), duct (d), tracheid (tr), wood paren- 

 chyma (wp), medullary ray (mr), and lenticel (/). [After Osterhout.] 

 Y 



