A FEW NATIVE ORCHIDS 



197 



„S!H*:!ifSS£S ■t^'S-Si^^-i 



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

 the insect retreats from the flower, one or both 

 of the poUinia are withdrawn, as at B. Then im- 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

 ovary 



pollen -pouch 

 ur dnl"her-cel 



sMgina/y' 



ovary^ 



^:j5»-^. /pollen- pouch 

 '' ■ / or anther-cell 

 , -pollen mass 



10 A B 



