THE ESSENTIAL ORGANS OF PLANTS. 89 



FOVILLA. The rich protoplasmic liquid contained 

 within the intine (Fig. 257). 



POLLINIA. Pollen-grains cohering in masses. In Fig. 

 258 they are in pairs, and are furnished with stalk-like 

 processes ; but in some plants they are single, and without 

 a stalk. 



Pollen-grains display a great variety of shapes. Besides 

 the round and oblong (Figs. 259 and 260), you will find 

 them angular, lobed, and joined together in various ways 

 (compound pollen) by threes, fours, and even larger num- 

 bers. 



Look at the various forms of pollen pictured upon the 

 charts. 



Examine the pollen of flowers with your magnifying- 

 glass, and note the shape of the grains, and the kind of 

 surface they present. Observe the moistened pollen of 

 various plants under the microscope. 



EXERCISE XXXVII. 

 Forms of Connective. 



APPENDICULAR. When the connective, ex- 

 tending above or below the anther, takes the 

 form of a feather, or a lengthened point, or 



FIG. 261. FIG. 262. FIG. 263. 

 Appendicular. 



FIG. 264. FIG. 265. 

 Connective, widened. 



