221 



62 661 Mycologia 



America, many species of which are local, would proceed much 

 more slowly. 



An important aid in bringing together information regarding 

 relationship of the rusts, and especially regarding obscure spe- 

 cies, and in securing cultural material of critical forms, has been 

 the excursions, often of considerable length, undertaken by the 

 writer and members of his staff. 



Early in April, 1912, Dr. F. D. Kern and the writer paid a visit 

 to Auburn, Ala., where in company with Prof. F. E. Lloyd, field 

 conditions of Peridermium fusiforme and Puccinia angustatoides, 

 the latter on Rynchospora, were studied. 



In the latter part of May, 1912, the writer and Mr. F. J. Pipal 

 spent two days in LaGrange county on the northern border of 

 Indiana, in a vain search for the alternate host of the Carex rust, 

 Puccinia vulpinoidis. 



An excursion on the last of May, 1912, was made to the coast 

 of Maine by Mr. C. R. Orton and the writer. The localities 

 visited were on the Isle au Haut, where the writer had found a 

 number of imperfectly known rusts during several vacational so- 

 journs. A station for the Puccinia on Carex maritima on Deer 

 Isle was also visited. All previous observations had been made be- 

 tween July and October, and this long journey of over a thousand 

 miles was for the purpose of seeking out probable aecial hosts 

 under spring conditions. Upon the return journey, Mr. Orton 

 stopped in Vermont and secured cultural material, especially 

 forms on Carex. 



Between June 17 and 20, 1912, the writer made observations in 

 company with Dr. J. J. Davis about Madison, Wis., and north- 

 ward. 



From the middle of July to the middle of August, 1912, Dr. 

 Kern and the writer traveled over a thousand miles through the 

 high mountains of southern Colorado, going west through the 

 middle of the state, and returning along the southern border. A 

 week was spent in the wonderful valley at Ouray and some days 

 at Pagosa Springs. Very helpful information was gleaned re- 

 garding grass rusts, and particularly of the leaf and stem forms 

 which the older mycologists listed as Puccinia graminis and P. 

 rubigo-vera. 



