POLLTNA 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 



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

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

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



