238 ANATOMY AM) PHYSIOLOGY of PLANTS. 



in moderating or increasing the influx of light and heat 

 on the fecundating organs. 



OF THE STAMEN. 



6. The stamen may be described as consisting of the 

 filament, anther and pollen. 



7. The filament is said to originate from the woody 

 texture, being formed of vessels. and elongated cells. 

 But as they derive their origin sometimes from the 

 corolla, they must necessarily be composed of the same 

 parts. 



It is well known that, by cultivation, many single flowers become 

 double. The stamens, in these cases, are converted into petals. 



8. The anther is a little case or sac, formed by a 

 thin but vascular membrane, and filled with the fecun- 

 dating dust or pollen. 



The anther is of very different jizc, figure and colour, in different 

 flowers ; and its attachment to the filament is not less subject to 

 variation. 



9. The pollen or farina is the subtle powder upon 

 which depends the fertility of the flower. 



In the Language of Botany (p. 82.) we have alluded to the differ- 

 ent forms of the pollen, in different plants ; and it only remains here 

 to observe, that each particle is a distinct and perfect production 

 capable of assisting in reproducing the individual. 



10. The stamen has been chosen by Nature, as one 

 of the two principal organs, to which is entrusted the 

 important office of continuing the species. 



