Nectaries on Leaves. 1 39 



flowers, and detain them from further advance. I do 

 not therefore hesitate to interpret all nectar-glands that 

 are found on leaves as means of protection against the 

 unwelcome, hecause unprofitable, visits of creeping in- 

 sects.^ 



' [Kemer makes no mention here of nectar-glands found neither 

 inside the flower nor on the leaves, but, as sometimes happens, on 

 the calyx. Fritz MUller {Natwe, Nov. 29, 1877), doubts whether 

 the calyx-glands of Malpighiaceee serve to protect the flowers from 

 crawlers. In one species, at any rate {Bunchosia gavdichatidiana), 

 he has found that they serve the same purpose as nectaries inside 

 a flower ; attracting bees, which in gnawing them get coated with 

 pollen on their under surface. Mr. Darwin points out that a 

 similar observation has been made by Mr. Earrer in respect of 

 Coronilla. — Editoe.] 



