CALYCIFLOR^ 247 



central axis having the seeds attached to it. These 

 are provided with a tuft of hairs, and being small 

 are easily blown to a distance by the wind. 



Epilobium montanum. — The leaves are seen to be 

 shortly stalked in Fig. 51. There is one flower not yet 

 fertilised showing the closed petals and the inferior ovary. 

 The capsules are beginning to dehisce and curl open. 



Evening Primrose {(Enothera odorata). 



As the English name denotes, the Evening Primrose 

 is one of those sweet-scented nocturnal or crepuscular 

 flowers that bloom in the evening, having as a rule 

 their flowers closed during the day. This is one of 

 the numerous adaptations of flowers to the habits 

 and requirements of those insects that are best 

 fitted to enable them to prolong the race in the most 

 perfect manner by the carrying of the pollen of one 

 flower to the stigma of another flower. In this work 

 nocturnal moths play an interesting part. 



There are two Evening Primroses in this country, 

 both of American origin, which are more or less 

 established. Others have been found recently which 

 are aliens, and, since the work of De Vries upon 

 mutations, numerous additional species have been 

 distinguished. (Enothera lamarckiana is, in fact, one 

 parent in the line of a number of these incipient 

 species or mutations. 



In England this species has been long established 

 on the Cornish, Devon, and Somerset coasts, and in 



