The Plants as a Whole. 



The sizes of the two plants is the first differ- 

 ence that one notices. A mature plant of the O,oxycoccus, 

 is not as large as a mature plant of O,macrocarpus, 

 neither is it's leaves or fruit as large. 



In putting up the material, I found that the fruit 

 of the O,oxycoccus was more acid than the fruit of the 

 O,macrocarpus, and aside from an inconstant variation 

 in shape I could see no other differences in the two 

 p lant s . 



Sections of the fruit. 



On plate 1, Fig. 1, we have a drawing of a cross 

 section of the epidermis and a few of the fruit cells 

 of a fruit of the O,macrocarpus, and on plate 2, Fig.l, 

 we have a similar cross section taken from the fruit of 

 a O,oxycoccus. These two drawings were made under the 

 same magnifying power and drawn by the aid of a camera 

 lucida. 



By a careful study of the two sections both un- 

 der the microscope and from the drawing, I was unable 

 to detect the least difference, either in structure or 

 content. In fact it would have been difficult to tell 

 which was from which, had it not been for the difference 

 in size of the berry. 



Leaves. 



Plate 1, Figs. 2 and 3, are drawings showing the 



