20 Chapters in Modern Botany CHAP, i 



of the other three genera of pitchered insectivorous plants 

 at present in cultivation viz. Sarracenia, Darlingtonia, and 

 Cephalotus with the result that substantially the same 

 condition of things was found to subsist in them all. " The 

 pitcher-plants may thus be regarded as ingenious mechan- 

 isms for first attracting insects, in order to receive their 

 aid in fertilisation ; and next, for the capture of these 

 insects, and their subsequent appropriation for purposes of 

 nutrition." These are in fact the " extra-floral nectaries " 

 well known in many plants, and which the reader may 

 most conveniently learn to know by looking for them on a 

 shoot of cherry laurel. 



