218 BROOKLYN BOTANIC GARDEN MEAIOIRS 



on species of Abies and Picea, obtaining the development of pycnia 

 and aecia on Picea excelsa. This is the only case in which culture 

 investigations have shown the aecia of Piiccinia strum to occur on 

 Picea. 



31. Uredinopsis Copelandii Sydow, Ann. Myc. 2: 34. Feb. 1904. 

 Uredinopsis Atkinsonii Magn. Hedwigia 43: 123. Mar. 1904. 

 Peridermium halsameum Peck, Rept. N. Y. State Mus. 27: 104. 



1875. p.p. 

 On Pinaceae: I. 



Abies grandis Lindl. — Trail to Sulphur Springs, Corvallis, Benton 

 Co., Nov. 7, 1914, jjjp; Corvallis, Feb. 2, 1914,^^00. 



Abies nobilis Lindl.- — Mary's Peak, Benton Co., Feb. 7, 1914, 

 F. D. Bailey, 3337, Aug. 15, 1914, 3334, 3335, 3336, 3338. 

 On Polypodiaceae : II, III. 



Athyrium cyclosorum Rupr. — Hoover, Linn Co., Aug. 19, 1914 

 H. P. Barss «& G. B. Posey, 3032; Mary's Peak, Benton Co., Aug 

 15, 1914, 3033, 3034; Elk City, Lincoln Co., Aug. 20, 1914, 2675; 

 Hood River Co., July 23, 1915, 3031; Grant's Pass, Josephine Co. 

 Sept. 5, 1916, J. R. Weir, 258; Yaquina, Lincoln Co., July 17, 1915 



3035- 



There seems to be no good reason for separating U. Copelandii 

 Sydow from U. Atkinsonii. All gradations in the length of the beak 

 of the urediniospores are found on the above collections. Most of the 

 material has urediniospores with long beaks and some of the collec- 

 tions show spores with both long and short beaks. 



Field observations as well as a study of morphological characters 

 would support the view that the aecia commonly referred to Peri- 

 dermium balsameum occurring on Abies grandis and A. nobilis in 

 western Oregon are genetically connected. 



Fraser (Mycol. 5: 236. 1913) has cultured U. Atkinsonii by 

 sowing aeciospores of Peridermium balsameum on Aspidium Thelepteris 

 followed sparingly by the development of uredinia. 



32. Uredinopsis Pteridis Dietel & Holway, Ber. Deuts. Bot. Ges. 



13: 331- 1895- 

 Aecidium pseudo-balsameum Diet. & Holw. Erythea 7: 98. 1899. 

 Peridermium pseudo-balsameum Arth. & Kern, Bull. Torrey Club 

 33: 430. 1906. 

 On Pinaceae: I. 



Abies amabilis (Loud.) Forb. — Whitewater Creek, near Mt. Jeffer- 

 son, Aug. II, 1914, H. P. Barss & G. B. Posey, 32Q4. 



Abies grandis Lindl. — Corvallis, Aug. 1910, 32QQ, May 8, 1909, 

 comm. Clarence D. Learn, April 29, 1914, F. D. Bailey, 3303; Ump- 



