212 MAINE AGRICULTURAI, EXPERIMENT STATION. I913. 



the spores which vary from the obovate type of Sporotrichum to 

 the septate type of Fusarium. The chief difterence which is to 

 be noted is that the fungus studied by Stewart is described as 

 producing a predominance of spores of the obovate to pyriform 

 type while in the fungus isolated from apples in Maine the type 

 of spore which predominates varies with the age of the culture 

 and with the conditions of growth. 



In response to a request for cultures of the carnation bud-rot 

 fungus for comparison with the apple fungus, Stewart replied 

 that after the completion of their studies the cultures had been 

 allowed to die. Some of the old cultures had been saved, how- 

 ever, an:! these were sent. AA'hile the w'riter did not have the 

 opportunity to see this fungus alive and growing under the same 

 conditions as the fungus from apple, there seemed little reason 

 to doubt that the two fungi were very closly related. The pro- 

 portion of obovate spores seemed greater in the old cultures 

 which were sent by Stewart than in old growths of the apple 

 fungus. The fact that so few spores of the septate type were 

 found caused Stev.^art to regard the fungus as being more prop- 

 erly classified in the genus Sporotrichum than in Fusarium, 

 although he points out that no other species of Sporotrichum is 

 described as having septate spores. 



At about the same time that Stewart was studying the carna- 

 tion bud-rot Heald * was investigating a similar disease in 

 Nebraska. In Heald's first account of this disease published in 

 Science t a species of Fusarium was regarded as the cause of 

 the rot but in the later publication the causal fungus is con- 

 sidered to be Sporotrichum anthophilum. Later in this paper 

 data will be presented which will show that the fungi encoun- 

 tered in the two cases were not necessarily the same. The writer 

 determined by means of inoculation experiments that certain 

 typical species of Fusarium can cause rot of carnation buds so 

 that it is not impossible that Heald was working with two differ- 

 ent fungi. On the other hand the bud-rot fungus may have 

 shown a large proportion of septate spores in one case and of 



* Heald, F. D. The Bnd Rot of Carnations, Xeb. F.xpt. Sta. Bui. 103, 

 1908. 

 t Science, N. S., 23 -.620, 1906. 



