302 



Mycologia 



Coleosporium ribicola has been successfully inoculated on Pinus 

 edulis, P. pine a,- Grossularia divaricata, G. hirtella, G. reclinata, 

 G . inermis, G. innominata, G. missouriensis, Ribes americanum, 

 R. aureum, R. fasciculatum, R. inebrians, R. nigrum, R. odoratum, 

 and R. vulgare. 



The specimens of Coleosporium ribicola from Minnesota and 

 Wisconsin were collected in 191 7 to 1919. The rust, although 

 sparse, was widely disseminated in Wisconsin in 1918. No aecial 

 host for the rust in these two states has been found, nor is the 

 reason known for its sudden appearance in 191 7, and apparent 

 disappearance since 1919. 



Coleosporium solidaginis 



Coleosporium solidaginis (Schw.) Thum. was first described 

 in the uredinial stage by Schweinitz 11 in 1822. The telial stage 

 was described by von Thumen 12 in 1878 and the fungus assigned 

 to the genus Coleosporium. The aecial stage was described by 

 Underwood and Earle 13 in 1896 and called Peridermium acicolum. 

 Proof that this Peridermium is the aecial stage of Coleosporium 

 solidaginis was published by Dr. Clinton 14 in 1907. 



In 1906, 15 Arthur and Kern described Peridermium montanum 

 as a new species on Pinus contorta from the northwestern United 

 States and Canada. The senior writer in 1914 16 infected Aster 

 with this species, and Weir and Hubert in 191 5 17 infected species 

 of Aster and Solidago with it, and this species was assigned to 

 Coleosporiu m so lidaginis . 1 6 



11 Schweinitz, L. D. Synopsis fungorum Carolinae superioris. Schr. Nat. 

 Ges. Leipzig 1: 70. 1822. 



12 von Thumen, F. New Species of American Uredineae. Bui. Torrey 

 Club 6: 216. 1878. 



is Underwood, L. M., & Earle, F. S. Notes on the Pine Inhabiting Soecies 

 of Peridermium. Bui. Torrey Club 23: 400. 1896. 



1 4 Clinton, G. P. Peridermium acicolum the aecial stage of Coleosporium 

 solidaginis. Science, N. S. 25: 289. 1907. 



1 5 Arthur, J. C, & Kern, F. D. North American Species of Peridermium. 

 Bui. Torrey Club 33: 413. 1906. 



1 6 Hedgcock, G. G. Identity of Peridermium montanum with Peridermium 

 acicolum. Phytopathology 7: 64, 67. 191 6. 



17 Weir, J. R., & Hubert, E. E. Inoculation Experiments with Peridermium 

 montanum. Phytopathology 6: 68, 70. 1916. 



