THE ESSENTIAL ORGANS OF PLANTS. 85 



It is on the other side that the connective is usually 

 visible, if seen at all, and that the filament is in most cases 

 attached (Fig. 234). 



FIG. 236. Introrse Anthers. 



Facing the Corolla. 



FIG. 237. FIG. 238. 



Extrorse Anthers. Extrorse Anthers. 



Anthers are INTRORSE when the line of dehiscence, or 

 face of the anther, is toward the pistil (Fig. 236). 



Anthers are EXTRORSE when the line of dehiscence, or 

 face of the anther, is turned toward the corolla (Figs. 237 

 and 238). 



Look over the charts for examples of extrorse and 

 introrse anthers. Observe this feature when you study 

 flowers. 



EXERCISE XXXIV. 

 Attachment of Filament to Anther. 



INNATE. Anthers are innate, or basifixed, when the fila- 

 >nt runs directly into the base of the connective (Figs. 

 239, 240, and 244). 



ADNATE. Anthers are adnate, or dorsifixed, when the 

 filament runs up the back of the anther, joining the con- 

 nective in such a way that the anther is hung in front of 

 it (Figs. 241 and 242). 



VERSATILE. If the filament is attached by a slender 

 apex to the middle of the anther, the ends of which swing 



