80 



BULLIFORM CELLS. 



Fio. 20.— A section of Festuca uigantca, Hiinilar to tho previous llKure. 1 y !*).— 

 (Hiicliel). 



T°. The leaves of Leernia ori/zuu/cs (rico cut-grusH), luivu nu- 

 nuTous bunds of bulliform cells on the upper surface, each side of 

 the middle, and one band each side of the keel on the lower side. 



Fio. 27.— Transverse section of a leaf of Lecrxia oruzintlcx (rice ciit-Krass), showinar 

 lateral bands of bulliforiii cells on liie upper side, ana one lateral band below on eacli 

 side of tlie keel. 1 x :t,jO.— (Duval-Jouvc'). 



8°. Tlie leaves of Ainphicdrpuni Purshii and others, have 

 opposite bands of bulliform cells on both surfaces of the leaf, 

 though those above are the most prominent. 



Fio. 28.— Transverse section of a leaf of ^mpJiiVrtrji^m Pnrs/iif, showing opposite 

 bauds of bulliform cells on both surfaces. 1 x 25.— (Sudworth). 



