I Pitcher Plants 9 



ventilation becomes checked, and the foul air rising from 

 dead predecessors must still furthef check respiration ; little 

 wonder then that life must fail. Even in our greenhouses 



FIG. 2. Leaves of Sarracenia purpurea. A, attractive surface of lid ; B, 

 conducting ; C, glandular, and D, detentive surface, magnified. (A and D 

 are taken from S. jlava.) 



the leaf thus becomes filled, not only I or 2, but often 

 5 or 6 inches deep with dead insects ; while observers 

 on the spot, notably Dr. Mellichamp, to whom our know- 



