20 



BULLIFORM CELLS. 



Fig. 26.— a section of Festiua gigantea, similar to the previous figure. 1 x 30, — 

 (Hackel). 



7°. The leaves of Leersia oryzoides (rice cut-grass), have nu- 

 merous bands of bulliform cells on the upper surface, each side of 

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



Fig. 27.— Transverse section of a leaf of Leersia nrj/znides (rice cut-grass), showingr 

 lateral bands of bulliform cells on the upper side, and one lateral band below on each, 

 side of the keel. 1 x 350.— (Duval-Jouve). 



8°. The leaves of uiinpliicarpuin Pursltii and others, have 

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

 though those above are the most prominent. 



Fig. 28.— Transverse section of a leaf of AmpMcarpum Pwrs/m, showing opposite 

 bands of bulliform cells on both surfaces. 1 x 25.— (Sud worth). 



