PLATE 40 



A. — Cross section of stem showing granular deposit in cell of cortex and formation 

 of intercellular spaces proceeding from the region of the fibers centripetally. X 450- 



B. — Cross section of stem showing large schizogenous cavity between cells of peri- 

 cycle and cortex and centripetal advance of the formation of intercellular cavities. 

 X 45°- 



