STUDIES OF DISKASK rRODUClNG SPECIES OF FUSARIUM. 253 



inoculation experiments will be necessary in determining the 

 extent to which each species may cause disease. 



Conclusion. 



Plant pathologists have felt the need of 'a comprehensive piece 

 of work in which species of Fusarium from a large number of 

 sources would be grown in culture under uniform conditions so 

 that their classification could be based on the characteristics 

 brought out in the cultures. In 1910 the first part of a mono- 

 graph of this genus, based on this method, was published by 

 Appel and Wollenweber.* By their methods of culture, what 

 they consider normal development is secured and cultures from 

 different sources can be compared. 



Later, in the winter of 1911, Dr. Wollenweber came to this 

 country to study American forms. Realizing the importance of 

 this work, the writer turned over to him transfers from cultures 

 of 35 strains from various sources in February, 1912. These 

 are being studied in culture according to Dr. Wollenweber's 

 methods and it is expected that matters of interest in regard to 

 their classification will be included in a part of the monograph 

 to be published later. 



It was hoped both by Dr. Wollenweber and the writer that 

 part or all of the strains would be classified in time so that the 

 names could be included in this paper, but on account of other 

 work only a limited amount of time could be given to these 

 cultures and for that reason Dr. Wollenweber made only a pre- 

 liminary report on the classification of a part of the fungi. 



APPENDIX. . 



Shortly after Dr. Lewis severed his connection with this 

 Station Dr. Wollenweber made a more detailed report of his 

 conclusions with regard to the relationship of the cultures of 

 the various strains of Fusarium which had been received by him 

 from Maine. Since Dr. Lewis' paper had been written up largely 

 from the standpoint of the data obtained from his own studies 

 and independent conclusions it would, in a measure, destroy its 

 individual value as well as tend to obscure the important feat- 

 ures of Dr. Wollenweber's report were the latter to be incor- 



* .See foot-note p. 209. 



