Arthur: Cultures of Uredineae in 1908 227 



sequent cultures confirmed the inferences from field observa- 

 tion, and abundantly justified the method pursued in this case in 

 tracing the life history of a little or imperfectly known rust. 



The next important excursion to points outside of the state of 

 Indiana was made by my associate, Mr. F. D. Kern, the writer's 

 ill health preventing further active participation in securing mater- 

 ial for the work of the season. Mr. Kern reached Denver, Colo., 

 on May 16, and spent five days collecting material and making field 

 observations chiefly along the foot hills from Boulder on the north 

 to Trinidad on the south. During this time he had the invaluable 

 assistance of Mr. E. Bethel, the able mycologist of Denver, who 

 supplied important information about suitable localities to visit, 

 and for part of the time himself went along to help in every way 

 possible. The results fully justified the time and outlay, espe- 

 cially in the way of knowledge regarding the numerous and intri- 

 cate forms of cedar rusts. The telia of the true Roestelia 

 cornuta were collected on this trip for the first time in America. 

 The telia of the true R. penicillata, little known in America, were 

 also taken, but owing to misfortune in manipulation did not lead 

 to successful cultures. 



On his return journey from Colorado Mr. Kern made a detour 

 to Racine, Wis., where as the guest of Dr. J. J. Davis he visited 

 in an automobile the Wind Lake locality, made familiar to mycol- 

 ogists by Dr. Davis' numerous collections and observations. 

 Here material was obtained of the juniper rust, believed to be as- 

 sociated with the cornuta-like aecia on Aronia. It had been sent 

 by Dr. Davis for cultures in previous years, but had not been 

 brought to germination. This is the type locality for the species, 

 to which Mr. Kern has given the name Gymno sporangium 

 Davisii. 3 



At our request Mr. H. S. Jackson, of Newark, Del., made some 

 fruitful collecting tours for observations on the Atlantic coast 

 rusts. A two days' trip to Seaford and Lewes, Del., was made 

 the middle of November, 1907, and again to the same places the 

 latter part of April following. The duplicate trip was especially 

 designed to secure observations on the early appearance of aecia 

 in the immediate vicinity where telial culture material had pre- 



3 Bull. Torrey Club 35: 507. 1908. 



