1876.] 401 [Farlotv. 



termecliate variety from a locality in the Connecticut Valley, 

 which is often submerged for long periods. He suggested 

 that the seeds might furnish good specific characters in these 

 cases. Mr. Wright also showed a specimen of Carex, prob- 

 ably C. granularis, which had remarkably long flower stalks 

 of last years' growth. 



Mr. G. Dimmock showed specimens of Syritta pipiens, 

 and a butterfly, Chrysophanus americana, which he had 

 found ensnared in the cross fertilization of the dandelion. 

 He had also noticed the common yellow and the cabbage 

 butterflies on these flowers. 



Mr. E. H. Hitchings exhibited a specimen of Liparis lilli- 

 folia in flower, a plant he thought as yet unrecorded from 

 our vicinity. 



Mr. Wilson remarked that Mr. B. P. Mann had found that 

 Rhodora exhibits a tendency to the separation of the sexes, 

 and hoped that the members of the Section would turn their 

 attention to the discovery of new cases of this kind. 



Section of Botany. June 19, 1876. 



Dr. J. C. White in the chair. Twenty-one persons present. 



Dr. W. G. Farlow showed specimens of Wild Cherry 

 (Prunus serotina), with the stamens, petals, and ovary ab- 

 normally swollen. 



• This disease is the same as is known in Germany as plum pockets. 

 It is a fungus Ascomycetes in its simplest form, named Exoascus 

 pruni. Specimens of May Apple, similarly distorted, were shown. 

 These swellings have only recently been shown to be due to fungi, 

 having been supposed to be caused by insects. 



In answer to a question concerning division of sexes, Al- 

 lium trococcum was shown by Mr. G. F. Waters, who also 

 stated that the female plants disappear in an asparagus bed. 



PROCEEDINGS B. S. N. H. — VOL. XVIII. 26 JANUARY, 1877. 



