56 



62 Journal of Mycology [Vol. 11 



brown, subepidermal; teleutospores prismatic or oblong, 11-14 by 29^12 /*, 

 rounded at both ends ; wall cinnamon-brown, smooth, uniformly 1 M thick. 



On Salix amygdaloides Anders., and many other species of Salix, 

 throughout the United States and Canada. 



Beside this common willow rust, another is known to occur on 

 Salix herbacea L. in Greenland and on Mt. Washington, N. H., Melamp- 

 sora artica Rostr. One other, Mclampsora rcpcntis Plowr., on Salix repens 

 has been reported from North America, but has not been seen by the 

 writer. 



2. Puccinia TOM I para Trel. I am indebted to Mr. 

 E. W. D. Hoi way for the suggestion, which led to the certain 

 demonstration of the aecidial connection for this species. Mr. 

 Holway's observations were made in the field, and showed such 

 close association of the recently germinated teleutospores on 

 over-wintered leaves of Brotnus cilia/us and the appearing aecidia 

 on Clematis Virginiana, that the conclusion seemed foregone. 

 His direct observations extended over two seasons. Teleuto- 

 sporic material gathered by Mr. Holway at Decorah, Iowa, was 

 sown on Impatiens aurea, Dirca palustris. Clematis Virginiana, 

 C. Fremontii, C. Scottii, C. Viorna, and with no infection ex- 

 cept on Clematis Virginiana. Teleutosporic material of Bromus 

 ciliatus was kindly sent by Dr. J. J. Davis from Kenosha Co., 

 Wis., and sown on Clematis Virginiana with most abundant 

 infection. Material was also used, obtained near Lafayette, 

 Ind., on Bromus ciliatus, and sown on Dirca palustris and 

 Clematis Virginiana with no infection of the former and the 

 most plentiful infection of the latter. The record of dates is 

 as follows : 



May 12, Teleutospores (Iowa) sown on Impatiens aurea; no infection. 

 May 12, Teleutospores (Iowa) sown on Dirca palustris; no infection. 

 May 12, Teleutospores (Iowa) sown on Clematis Scottii; no infection. 

 May 12, Teleutospores (Iowa) sown on Clematis Fremontii; no infection. 

 May 12, Teleutospores (Iowa) sown on Clematis Virginiana; May 19, 



spermogonia ; May 28, aecidia. 

 May 18, Teleutospores (Ind.) sown on Dirca palustris; no infection. 

 May 25, Teleutospores (Iowa) sown on Clematis Scottii; no infection. 

 May 25, Teleutospores (Iowa) sown on Clematis Fremontii; no infection. 

 May 25, Teleutospores (Iowa) sown on Clematis Viorna; no infectiop. 

 May 25, Teleutospores (Iowa) sown on Clematis Virginiana; May 31, 



spermogonia ; June 9, aecidia. 

 May 30, Teleutospores (Ind.) sown on Dirca palustris; no infection. 

 May 30, Teleutospores (Ind.) sown on Clematis Virginiana; June 7, 



spermogonia ; June 15, aecidia. 

 June 3, Teleutospores (Wis.) sown on Clematis Virginiana; June 9, 



spermogonia ; June 16, aecidia. 



This record shows that the report made last year, con- 

 necting the teleutosporic stage on Bromus ciliatus with the 

 aecidium on Dirca palustris 2 * was a mistake. The teleutosporic 

 material from Lafayette, which grew so abundantly on Cle- 

 matis Virginiana this year, came from the same plants that 



25 Jour. Mycol. 10:19. 1904. 



