CYPRIPEDIUM 17 



Ultimately it forced its way out through one of the small 

 orifices close to one of the pollen masses (B), and when 

 caught was found smeared with the glutinous pollen." 



It has been noted that on tearing the lip of the Yellow 

 Lady's-Slipper apart, there are several crescent-shaped 

 translucent spots on the back of the labellum, through 

 which the light can shine more brightly and that help to lead 

 the imprisoned bee back to where he can catch a glimpse of 

 the real daylight up above him on either side of the anthers. 



There is in France a Yellow Lady's-Slipper called 

 "Sabot de la Vierge" and "Soulier de Notre Darne," that is 

 very like Cypripedium puhescens, but has a broad band 

 of hairs on the floor of the labellum. "These," says Miiller, 

 who has watched thousands of insects pay their visits to the 

 plants, "seem to help the bees to climb up toward the 

 orifices, besides attracting them by their secretions." 



6. SMALL YELLOW LADY's-SLIPPER 



Cypripedium parviflorum, Salisb. (Plates VII. and VIII.) 



The smaller Lady's-Slipper resembles the larger in every 

 general description, but can always be distinguished from it 

 if the two species are seen together. They bloom at about 

 the same time, and in the same woods. The smaller species 

 is rarer and roves wider, extending from Newfoundland to 

 British Columbia, while the larger one is easier to find, but 

 only from Nova Scotia to Minnesota. 



The smaller Yellow Lady's-Slipper (Plate VII., Fig. i) 



