MICHIGAN ACADEMY OF SCIENCE. 



67 



figure 11, excepting that indicated by "g" is apparently leaf. Various sizes 

 of opening ''c" can he seen, leading one to suppose that "g" is only a modi- 

 fication of "c," and the opening through which the young stem grows. 

 Agricultural College, Mich. 



c 



f 



In figures 10, 11, 12, 13, 14, n signifies a leaf-sheath, h young stem, c a 

 crescent-shaped opening through Avhich the stem may grow / a fibro- vascular 

 bundle, g circular opening corresponding to c. 



