THE STAMENS. 



Y3 



Find, if you can, upon the charts instances of one- 

 celled anthers, of two-celled anthers, of four-celled 

 anthers. Mention the form of each anther-lobe pict- 

 ured upon the charts. 



EXERCISE XX. 

 Dehiscence of the Anther. 



FIG. 98. 



FIG. 99. 



FIG. 101. 



FIG. 102. 



FIG. 103. 



Vertical, or 

 Longitudinal. 



Transverse. 



Porous. 



Valvular. 



Valvular. 



VERTICAL, OR LONGITUDINAL DEHISCENCE. When 

 the anther opens by a slit along its length to emit 

 the pollen (Fig. 98). 



TRANSVERSE. When the line of dehiscence is 

 across the anther (Fig. 99). 



POROUS. When the anthers emit the pollen 

 through little pores (Fig. 101). 



VALVULAR. When a portion of the anther is 

 lifted up to emit the pollen (Figs. 102 and 103). 



