BULLIFORM CELLS. 



21 



9°. In the leaves of Paiiicum plicatum, the bauds of bulli- 

 forni cells are first on the upper side and then on the lower, and 

 are found in the grooves. 



Fig. 29.— Transverse section of a blade of Panicum plicatum, in which the buUi- 

 form cells are alternately above and below, 1 xio.— (Duval-Jouve). 



10°. In case of Andropogon 

 2)riuoides, and other species, 

 these cells are of nearly uni- 

 form size, and distributed all 

 Fig. 30.— Section of a leaf of Andropogon alonff the Upper Surface, ex- 



^''^•cepting over the veins. 



wrifi oides, where the bulliform cells are evenly 

 distributed, excepting over the veins, 



-(Duval-Jouve), 



Fig. 31,— Section, through the middle, of a leaf of Paspalum plicatum, showing Irreg- 

 ular epidermis and many buUiform cells. 1 x50.— (Sudworth.) 



Fig. 33. — Part of a transverse section of a leaf of Trachypngon p<)lumorphus, showing' 

 small epidermal and very large bulliform cells. 1 xSO.- (Sudworl h.) 



