382 PROCEEDINGS OF THE INDIANA ACADEMY OF SCIENCE, 



Rusts of Hamilton and Makion Counties, Indiana. 



II 



Guy West Wilsox. 



Since the publication of the catalogue of the Uredinales of tliis region, 

 (Proceedings for 1905, pp. 177-182), further field work has resulted in the 

 addition of some very interesting and important species to the list as well 

 as extending our knowledge of others. In the former list and in the present 

 paper those rusts which were collected in certain restricted areas are desig- 

 nated by an asterisk. For the sake of uniformity the same nomenclature is 

 used altho some important changes have been made since the pul^lication of 

 the first paper. 



12. Caeomurus perigynus (Halst.) Kuntze. 



The material on Carex ulriculala which was so recorded from Hamilton 

 County has since been made the type of a new species, I'romi/ees valens, 

 Kern, = A'?Y//Tr/o valens (Kern), Arthur. So far this species is known only 

 from Indiana. Its aecial stage is unknown. 



14. Caeomurus Polygoni (Pers.) Kuntze. 

 *0n Polygonum ercclum, L. Hamilton. 

 Usually very abundant on Polygninnii uriculare L. 

 The present season this host was appai-cntly free from I he rust while /'. 

 erect um Avas severely infected. 



40. Coleosporium Campanulae (Pers.) Lev. 

 *0n Campanula americana, L. Hamilton. 



This species was first noted in August, 1907, when it was rather rare. 

 The present season it, has been very abundant, causing partial defoliation 

 of the host. 



41. Dicaeoma Phlei-praiense (Erik.) 



*0n Phleum pralense L. Hamilton, Marion. 

 In August, 1910, this rust was noted as wiae spread and fairly abundant 

 on the timothy of roadsides and waste places, apparenth' not causing damage 

 to the crop. During the present season it has been very alnmdant, causing 

 serious damage in some meadows. In some cases the yield was reduced 

 over fifty per cent over sufficient area to make a noticeable reduction in the 

 total vield of the meadow. 



