A FEW NATIVE ORCHIDS 



I 9 7 



head, perhaps the eyes, of the burly visitor. As 

 the insect retreats from the flower, one or both 

 of the pollinia are withdrawn, as at B. Then im- 

 mediately follows a downward movement, which 

 exactly anticipates the 

 position of the stigma, 

 and as the bee enters 

 the next flower the pol- 

 len clubs are forced 

 against it (C), as in the 

 previous example. 



In the case of a smaller bee visiting the flower, 

 the insect would find it necessary to creep fur- 

 ther into the opening, and thus might bring its 

 thorax against the pollen-glands. In either case 

 the change of position in the pollinia would in- 

 sure the same result. 



Fig. 9 



gland 

 stigma s 

 ovary > 



/pollen -pouch 

 or anther-cell. 



stigma 



pollen-pouch 

 7 or anther-cell, 

 -pollen mass 



