C/T03S 3CT/0/f 



fall uccd 



rind (r cortex) 



LONC/T UDI NAL 3ECT/ON 



135. Oak branch: (ck) cork, (cc) cork cambium, (col) collenchyma, (cor. p) cortical 

 parenchyma, (str) strengthening cells, (cr) crystal-bearing cells, (bp) bast paren- 

 chyma. (sp~) sieve -plate, (*) sieve -tube, (d) duct, (tr) trachei'd, (wp) wood 

 parenchyma, (st. wp) wood parenchyma containing starch, (mr) medullary ray, 

 (0 lenticel. 



