PLATE XXII. 



Janusia gracilis. 



Fig. 1. Cross section of young stem, x 42. A, pith; B, xylem; C. 

 phloem; D, pericycle; E, primary cortex. 



Pig. 2. Cross section of old stem. X 40. A, pith; B, xylem; C. 

 phloem; D, parenchyma of the pericycle; E, the part of the cortex which 

 contains the chlorophyll-bearing palisade cells, outside of which is the 

 cork. 



