Reprinted from Mycologia, Vol. XIII., No. 4 and 5, 1021.] 



297 



MEMORANDA AND INDEX OF CULTURES 

 OF UREDINEAE, 1899-1917 1 



J. C. Arthur 



The cultures of the rusts, which were conducted under the 

 auspices of the Purdue University Agricultural Experiment 

 Station, and extended over a period of nineteen years, had a small 

 beginning-. For the first three years only such time was given 

 to the work as the writer could spare from his duties as head 

 of the Botanical Department of the Station and as Professor of 

 Vegetable Physiology and Pathology in Purdue University. In 

 most of the following years an assistant was especially employed 

 during two or so months each spring, who had entire charge of 

 the testing of spore viability, sowing of the spores, and care of 

 the inoculated plants, the chief part of the culture work being 

 done during May and June. The position was held by fourteen 

 individuals, selected with the needs of the work especially in 

 view, and ranging from a junior high school student to univer- 

 sity instructors, who without exception showed superior ability 

 in conducting the work. Financial support was provided by a 

 grant from the Botanical Society of America in 1903, 1906 and 

 1907, and by cooperation with the Bureau of Plant Industry of 

 the U. S. Department of Agriculture in 1904 and 1905. In the 

 other years it was supplied by the Purdue University Agricul- 

 tural Experiment Station, and from 1908 onward the work was 

 made a part of the rust project under the Adams fund. 



During the progress of the work the writer, usually accom- 

 panied by an associate, made many shorter or longer excursions 

 for securing data and material. These field observations were 

 directed toward detecting the juxtaposition of spore-forms that 

 might be supposed to have genetic connection, as well as toward 

 securing suitable culture material. The fruitfulness of this 

 method is apparent from the fact that during the extended study 



1 Contribution from the Botanical Department of the Purdue University 

 Agricultural Experiment Station. 



230 



