Notes and Brief Articles 



45 



A number of fungi associated with Meliola which were previously 

 supposed to represent a stage in the development of the Meliola 

 are now known to be parasites. A list of about thirty such spe- 

 cies has been prepared for publication, belonging mainly to the 

 ascomycetes and imperfects. 



G. W. Keitt next read a paper on the leaf spot of cherries. 

 Cherries are cultivated extensively in the region studied and the 

 leaf spot has been very destructive. The paper was limited 

 mainly to the methods of controlling the disease. Control has 

 been accomplished along two lines : (i) sanitation and (2) spray- 

 ing. Both together have been found to be very effective. Sev- 

 eral different kinds of sprays have been employed. The effective- 

 ness of the control was well illustrated by means of lantern slides. 



W. C. Coker spoke on the genus Amanita in the South. The 

 material on which this paper was based was collected in the same 

 general region in which Curtis and Ravenel collected many years 

 ago. According to Coker, there is no good reason for separating 

 the two genera Amanita and Amanitopsis. Specimens found 

 growing in large numbers in close proximity showed the presence 

 of the veil to be very inconstant. In many cases, it simply failed 

 to develop. Interesting discussion followed the reading of this 

 paper. 



The next paper was by J. Rosenbaum on strains of Rhizoctonia. 

 Two strains of this fungus have been isolated from the stems of 

 potatoes, which can be distinguished pathologically, physiolog- 

 ically, and morphologically. It is possible that the presence of 

 different strains may account for the conflicting reports regarding 

 artificial infection by the fungus. 



C. W. Edgerton spoke briefly of disease resistance to certain 

 fungi in tomatoes. There is a great deal of difference in the sus- 

 ceptibility of plants grown in the same field. Selection and 

 crossing of plants have shown good results in the production of 

 immunity to the disease. Discussion followed the reading of the 

 paper. 



R. H. Colley gave a very interesting paper on the mycelium of 

 the white-pine blister rust, calling attention to the way in which 

 the haustoria penetrate practically every cell in the infected re- 

 gion of the host, often causing the nucleus to be pushed in on one 



