i6 



Chapters in Modern Botany 



CHAP. 



lead the insect gently to the dangerous verge, at which the 

 fluid contents of the pitcher come fully into view, and the 

 glassy conducting surface can be easily reached. Dickson 

 discovered also the apparently constant presence of a row 



FIG. 3. Pitcher of Nepenthes distillatoria.. A, honey gland from attractive 

 surface of lid ; B, digestive gland from interior of pitcher, in pocket-like depres- 

 sion of epidermis (opening downwards) ; C, transverse section of the same. 



of very large flask-shaped glands along the very edge of 

 this incurved rim, and presumably of further attractiveness. 

 The edges of the flutings are often produced downwards 

 into stout hook-like processes, which are sometimes strong 

 enough to retain a small bird. 



