JOURNAL OF MYCOLOGY. 



Vol. I. MANHATTAN, KANSAS, FEBRUARY, 1885. No. 2. 



ENUMERATION OF THE NORTH AMERICAN 

 CERCOSPOR^. 



WITH DESCRIPTION'S OF THE SPECIES. 



BY J. B. ELLIS AND BENJAMIN M. EVEKHAKT, 



The genus Cercospora which was established by Fresenius about 

 thirty years ago, comprised at first only a few species, taken mostly from 

 several other genera in which they did not seem properly to belong. In 

 his Beitrage 2ur Mycologie (1863) he describes four species. Fuckel, in his 

 Symholoe Mycologicce (1869), enumerates ten species. Saccardo, in the first 

 volume of Michella, mentions and describes thirty-eight species, and in 

 the second volume (1882) adds about twenty more. Thirty-seven addi- 

 tional species have been described by Cooke in Grevillea. Peck, in the 

 Reports of the iV. Y. State Museum has added about a dozen, while Yon 

 Thumen, Dr. Winter, and various others, including the writers of this 

 article, have further contributed to swell the number of published species, 

 till the list has become almost formidable. And now, before this rapidly 

 accumulating mass of new and old species shall become entirely unman- 

 ageable, we have thought it might be well to "take an account of stock," 

 to see, if possible, how we stand. With this object in view, we have 

 made this "•Enumeration" of the species thus far described in this coun- 

 try. We have tried to reduce and condense the list as far as consistently 

 could be done, and, if we have failed to do this satisfactorily our labor 

 still will not be lost, for, by bringing the scattered fragments together 

 into one body, we have made it easier for others to carry on and complete 

 the work which is here begun. 



Cercospora (Gr. ]ce7'kos a tail, and spora a spore) is a genus of 



