

sscr /oAf 



, . rind (of ccffex) 



€or. fi-^-'^^et^cc*!!^ 



rind (tr cortex) 

 LONCtT UDI NAL ^£CT/ON 



135. Oak branch: (cA;) cork, ice") cork cambium, {coV) collenchyma, ^cor.v) cortical 

 parenchyma, {sir) strengthening cells, {cr) crystal-bearing cells, (6j)) bast paren- 

 chyma, {sp) sieve -plate, (sO sieve -tube, (d) duct, {tr) tracheid, Kxvp) wood 

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

 {I) lenticel. 



