On Flowers and Insects. 



139 



upper lip covers and protects the stamens and 

 pistils. 



The arrangement and structure of the stamens 

 is, however, very peculiar and interesting. As in 

 the Deadnettle, they are four in number, but one 



Fig. 40. Stamens in their natural position. 



Fig. 41. Stamens when moved by a bee. 



pair is quite rudimentary (fig. 37, b\ In the other 

 (a a) the two anthers, instead of being attached 

 close together at the summit of the filament, are 

 separated by a long movable rod, called a con- 

 nective (figs. 40, 41, ;), so that they can play freely 

 on the stalk of the stamen. In a natural position, 



