v.] SALVIA. 157 



upper lip shows an arch at the part x, and the 

 front portion of the lip, containing the stamens, is 

 loftier than in Lamium, and does not therefore come 

 in contact with the back of the bee (Fig. 112). In evi- 

 dent correlation with this arrangement, we find a very 

 remarkable difference in the stamens (Figs. 115-16). 

 Two of the stamens (Fig. 112, /') are minute and 

 rudimentary. In the other -pair, the two anther cells 

 (Fig. 115 a, a'} instead of being, as usual, close 



FIG. 115. Stamens in their natural FIG. 116. Stamens when moved by 



position. a Bee. 



together, are separated by a long connective (m). 

 Moreover, the lower anther cells (a, a) contain very 

 little pollen ; sometimes indeed none at all. This 

 portion of the stamen, as shown in Fig. 1 12, hangs 

 down and partially stops up the mouth of the 

 corolla tube. When, however, a bee thrusts its head 

 into the tube in search of the honey, this part of 

 the stamen is pushed into the arch (x), the con- 

 nectives of the two large stamens revolve on their 

 axis, and consequently the fertile anther cells (a'} 



