cri/shed 

 bast 



134. Cross-section of a bundle of Corn: id) dnct, (a) annular tracheid (i. e., with ring- 

 shaped thickenings), {sp) spiral tracheid (i. e. with spiral thickenings), iicp) wood 

 parenchyma, {st) sieve-tube, {cc) companion cell, {str) strengthening fibers. 



