POLLINA TION. 



443 



857. Cypripedium, or lady-slipper. -One species of the lady-slipper is 

 shown in fig. 468. The labellum in this genus is shaped like a shoe, as one 



Fig. 461. 

 A group of jacks. 



can see by the section of the flower in fig. 468. The stigma is situated at st, 

 while the anther is situated at a, upon the style. The insect enters about 

 the middle of the boat-shaped labellum. In going out it passes up and out 



