CHAP, iv.] REPRODUCTION OF PLANTS. 



143 



(Salvia), belonging to the same order of plants as the 

 white dead-nettle. The corolla of the sage flower is 

 formed on the bilabiate type, but owing to the certainty 



Fig. 42. One of the sages (Salvia scalarea). In Fig. I., ob is the 

 large curved upper lip of the corolla ; n, the tip of the style with its 

 two stigmas ; s, an anther that has come clown upon the back of the 

 insect; Fig. II., s i and s 2, the two stamens; n, the tip of the 

 style showing the two stigmas ; r, the portion of the anther that the 

 insect's head comes in contact with in thrusting down the tube of the 

 corolla to reach the honey, when this part is pressed downwards it 

 causes the stamen to suddenly spring down upon the insect's back. 

 The lip or landing-stage has a second platform springing from its 

 under surface, on which the insect stands. 



of securing fertilization the stamens are reduced to two, 

 and these two have each only one of the usual two 

 anther-lobes present, so that in reality there is only pre- 

 sent the amount of pollen produced by one normal anther. 



