80 



THE SECOND BOOK OF BOTANY. 



thin, tough, and elastic, often seen protruding through 

 holes in the extine (Figs. 132 and 133). 



FOVILLA. The rich protoplasmic liquid contained 

 within the intine (Fig. 133). 



FIG. 181. 



FIG. 132. 



FIG. 182*. 



FIG. 183. 



FIG. 134. 



Intine. 



Fovilla. 



Extine. 



Polinia. 



POLINIA. Pollen-grains cohering in masses. In 

 Fig. 134 they are in pairs, and are furnished with 

 stalk-like processes ; but in some plants they are sin- 

 gle, and without a stalk. 



FIG. 185. 



FIG. 136. 



