io6 



SAXIFRAGACE&, PARNASSIA. 



[CHAP. 



while the others secrete honey at the base, and 

 terminate in from eight to seventeen beautiful 

 yellow globular glands. These glands so closely re- 

 semble drops of honey that it is difficult to believe 

 they are perfectly dry. They probably serve as sham 

 drops of honey to attract flies. The five polliniferous 

 anthers ripen, not simultaneously, but successively, 

 and "as each ripens it places itself right on the 



FIG. 81 Drosera rotundifolia. 



top of the stigma, with its back to it, and the pollen 

 is then discharged from the anther on the side away 

 from the stigma, so that it is scarcely possible for any 

 to fall on it ; and this is done by each of the five 

 stamens in succession " (Bennett, " How Flowers are 

 Fertilised," 1873, p. 19). The flowers are much visited 

 by insects, especially by flies. 



In the cases we have hitherto considered, the 

 relation between the flowers and insects is one of 



