JACKSON: UREDINALES OF OREGOxN 205 



On Pinaceae: I. 



Abies grandis Lindl.- — Scottsburg, Lane Co., Sept. i, 1914, G. G. 

 Hedgcock, 20210. 



Abies magnifica A. Murr. — Road to Crater Lake, Union Creek, 

 Camp Grant, Klamath Co., Sept. 23, 1913, E. P. Meinecke, Cr D 20. 

 On Vacciniaceae : IIL 



Vaccinium macrophyllum (Hook.) Piper — Austin, Grant Co., June, 



1913, J. R. Weir, 25; Sumpter, Baker Co., June, 1913, J. R. Weir, 24; 

 Silver Creek, Josephine Co., July 28, 1913, E. P. Meinecke, Si {D6) Di. 



Vaccinium myrtiUoides S. Wats. — Road to Crater Lake, LTnion 

 Creek to Camp Grant, Klamath Co., Sept. 23, 1913, E. P. Meinecke, 

 Cr D ig. 



Vaccinium ovalifolium Smith^ — Larch Mt., Multnomah Co., Aug. 

 1910, 1156; North slope Mt. Hood, Aug. 7, 1914, 1608. 



Vaccinium ovatum Pursh — Dothan, Douglass Co., Sept. 8, 19 14, 

 G. B. Posey, 7PJ2; Waldo, Josephine Co., Sept. 5, 1916, J. R. Weir, 

 280; Oregon, April 19-31, 191 1, H. D. House. 



Vaccinium parviflorum Smith — ^Whitewater Ranger Station, near 

 Mt. Jefferson, Aug. 12, 1914, H. P. Barss & G. B. Posey, 1730. 



Vaccinium scoparium Lieb.? — Mary's Peak, Benton Co., Aug. 15, 



1914, 1284. 



Specimens of aecia collected in various parts of North America on 

 Abies balsamea, A. concolor and A. lasiocarpa are now referred to this 

 species in the Arthur herbarium. 



The life history was first demonstrated by Hartig (Allg. Forst.- u. 

 Jagdzeitg. 289. 1880), who conducted culture investigations using 

 aecia on Abies pectinata and telia on Vaccinium Vitis-idaea. He 

 obtained successful infection in both directions. Other European 

 investigators, notably Dr. G. Winter, have amply confirmed these 

 results. (Klebahn, Die Wirtsw. Rostpilze 391. 1904.) 



In America, Arthur (Mycologia 2: 231. 1910) was the first to 

 culture this species and succeeded in obtaining aecia on Abies Fraseri 

 following exposure to infection from telia on Vaccinium pennsyl- 

 vanicum sent by W. P. Eraser from Nova Scotia. Later in the same 

 year Eraser made the first field collection of aecia on Abies balsamea 

 (Science 30: 814. 1909) and later (Mycol. 4: 177. 1912; 6: 27. 

 1914) confirmed Arthur's work by obtaining infection on Abies bal- 

 samea from telia on Vaccinium pennsylvanicum . 



6. Chrysomyxa Weirii Jackson, Phytopath. 7: 353. 1917. 

 On Pinaceae: 



Picea Engelmanii Parry — Whitman Nat. Eorest, Oregon, July 17, 

 19 13, J. R. Weir, 271. 



