/;) 
v u 
A. Cambium formed from thin walled cells of inner 
cortex. 
B. Later stage in development of the bundle. Xylem 
and phloem elements have been formed from the 
cambium. 
.a, xylem; b 7 phloem; c, cambium; d, inner cortex; 
e, medullary ray. 
