In the parenchy^ma near the under surface of the 

 O,oxycoccus one finds a few large crystals not found in 

 O,macrocarpus. In a.ll the material examined this same 

 condition prevailed throughout. 



Plate 5, Pig. 4, a portion of a cross section of a 

 leaf of O,macrocarpus under lower power than Pig. 2 of 

 the same plate. 



Plate 6, Pig. 4, a portion of a cross section of 

 a leaf O,oxycoccus under lower power than Pig. 2, of the 

 same plate. 



Each of these drawings show a secondary bundle, 

 very much alike in each case. In O,oxycoccus there is 

 an extra row of palisade cells but this did not seem to 

 be constant so I do not take it to be a difference. 

 Here, as in other studies on this plant, I am compelled 

 to admit that there is no noticeable difference. 

 Pigures 1 in Plate 5 and 6 are portions of cross sec- 

 tions of large roots of each of the two plants. There 

 is practically no difference in the structure of these 

 parts. The bundle arrangement in each plant is very 

 interesting from the mere fact of its simplicity. 

 Pigures 3 of plates 5 and 6 are cross sections of some 

 of the smallest roots of each plant. An interesting 

 phase in each case was the thick walls of the epidermal 

 cells. 



