[Reprinied from MYCOLOGIA, Vol. I , No. 6, November, 1909.] 



G) 



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CULTURES OF UREDINEAE IN 1908 1 



J. C. Arthur 



The present article forms the ninth of a series of reports 2 by 

 the author upon the culture of plant rusts, covering the years 

 from 1899 to the close of 1908. The grass and cedar rusts have 

 been especially prominent in the years' work. Very considerable 

 advance has been made in segregating the subepidermal rusts on 

 grasses that have generally passed under the name of Puccinia 

 rubigo-vera, and some particularly notable results were achieved 

 with forms of Gymnosporangium, partly in finding unexpected 

 aecial connections for well-known telial species, and partly in 

 segregating species heretofore confused under European names. 



This year for the first time since the series of cultures was 

 begun, the Indiana Experiment Station at Purdue University, 

 where all the study has been conducted, assumed the full expense 

 of the work. Heretofore the extra assistance needed during the 

 chief cultural period of about six weeks has been paid for in 

 part or wholly from outside sources. This year the cultural 

 work was made a part of an extended investigation of cereal and 

 other rusts to be conducted by the station, and the expenses met 

 from the Adams fund, derived from the general government. 

 The more definite and certain financial support has made it pos- 

 sible to better systematize and conduct the work. 



As in the previous year some collecting trips made expressly 



1 Read before the Botanical Society of America at the Baltimore meeting, 

 December 31, 1908. 



2 See Bot. Gaz. 29: 268-276, 35: 10-23; Jour. Myc. 8: 51-56, 10: 8-21, 

 11: 50-67, 12: 11-27, 13: 189-205, and 14: 7-26. 



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