JACKSON: UREDINALES OF OREGON 215 



3247; Odell, Hood River Co., Aug. 5, 1914, 1618; Crater Lake, 

 Klamath Co., Sept. 21, 1913, E. P. Meinecke, Cr Pk D (2) 2; Portland, 

 Aug. 24, 1915, E. Bartholomew (Barth., N. Am. Ured. 1482). 



This species is separated from P. piistulatiim largely on the basis 

 of culture investigations. All of the culture work has been conducted 

 with the above host species or other members of the same genus or 

 section of Epilohium. European investigators have amply demon- 

 strated the connection of this form with aecia on Abies (Klebahn, 

 Die Wirtsw. Rostpilze 393. 1904). In America, Eraser, working in 

 Nova Scotia (Mycol. 4: 176. 1912), was the first to conduct culture 

 experiments. He obtained, in three trials, the development of aecia 

 on Abies balsamea, from sowings with teliosporic material from C. 

 angustijoliiim . With the aecia thus obtained he sowed back to 

 Chamaenerion and obtained uredinia. Weir & Hubert (Phytopath. 

 6: 373- 1916) conducted similar work with Idaho material and suc- 

 ceeded in obtaining the development of aecia on Abies lasiocarpa. 

 The aecia thus obtained were sown back on the telial host (Phytopath. 

 7: 109. 191 7), with the result that uredinia were developed in 

 abundance. 



25. PucciNiASTRUM Galii (Link) Fischer, Ured. d. Schweiz 471. 



1904. 



Caeoma Galii Link, in Willd. Sp. PI. 6^: 21. 1825. 

 On Rubiaceae: II. 



Galium triflorum Michx.— Corvallis, April 29, 1914, F. D. Bailey, 

 1992, May 9, 1914, 1991, July 5, 1914, H. P. Barss, 1996, June 29, 

 1914, G. B. Posey, 1313, July 10, 1915,^104; Oregon City, Clackamus 

 Co., Aug. 20, 1915, E. Bartholomew, 5934 (Barth. N. Am. Ured. 

 1679); Grant's Pass, Josephine Co., Sept. 3, 1916, J. R. Weir, 187. 



This species is known to the writer from North America only from 

 the above collections and a specimen collected by J. W. Macoun in 

 British Columbia in 1915, one from Palmer Lake, Colorado, Sept. 6, 

 I9i3,by E. Bethel, both in the Arthur Herbarium, and a collection 

 made by Dr. H. Fitzpatrick and the writer at Michigan Hollow Swamp 

 near Ithaca, N. Y., July, 1916. All are on G. triflorum. The species 

 is evidently common in western Oregon and if aecia are developed, 

 doubtless occur on Abies grandis. Field observations made by the 

 writer, however, would indicate that this rust winters over in the 

 uredinial stage. 



26. PucciNiASTRUM GooDYERAE (Tranz.) Arth. N. Am. Fl. 7: 105, 



1907. 

 Uredo Goodyerae Tranz. Trudi S. Peterb. Obshch. Est. Otd. Bot. 

 23: 28. 1893. 



