30 Department Circular 195, U. S. Dept. of Agriculture. 



506. P. menthae P. — III, on Monarda 



menthaefolia. 

 Absarokee, Mont, Sept. 15, 

 1915, E. Bartholomew. 



507. P. menthae P. — III, on Pycnan- 



themum flexuosum. 

 Mount Carmel, 111., Sept. 28, 

 1889, M. B. Waite. 



508. P. menthae P. — II and III, on 



Pycnanthemum flexuosum. 

 Lake Huron, Ontario, Canada, 

 Aug. 11, 1911, J. Dearness. 



509. P. menthae P. — II, on Pycnan- 



themum muticum. 

 Swago Mountain, Pocahontas 

 County, W. Va., Aug. 18, 1902, 

 W. A. Kellerman. 



510. P. mesomegala B. and C. — III, 



on Clintonia uniflora. 

 Millwood, Colo., Feb., 1908, 

 J. D. Culbertson. 



511. P. mirifica Diet, and Holw — III 



and X, on Borrichia frutes- 

 cens. 

 St. Petersburg, Fla., July, 

 1894, P. H. Rolfs. 



512. P. montanensis Ell. — III, on 



Elymus canadensis. 

 Callaway, Nebr., Aug. 2, 1902, 

 J. M. Bates. 



513. P. muhlenbergiae Arth. and 



Holw. — I, on Callirhoe in- 

 volucrata. 

 Rockport, Kans., July 17, 1894, 

 E. Bartholomew. 



514. P. muhlenbergiae Arth. and 



Holw. — I, on CalNrhoe in~ 

 volucrata. 

 Stockton, Kans., May 10, 1911, 

 E. Bartholomew. Dupl. N. A. 

 Ured. 248. 



515. P. muhlenbergiae Arth. and 



Holw. — I, on Hibiscus mo- 

 scheutos. 

 Buckeye Lake, Ohio, W. A. 

 Kellerman. 



516. P. muhlenbergiae Arth. and 



Holw. — I, on Hibiscus mo- 

 scheutos. 

 Bowmans Bluff, N. C, May, 

 1902, A. W. Edson. 



517. P. muhlenbergiae Arth. and 



Holw. — III, on Muhlen- 



bergia mexicana. 

 Oregon, 111., Sept. 14, 1889, 

 M. B. Waite. Dupl. 1902 Myc. 

 Ex. 127a as P. windsoriae, on 

 Muhl'enbergia sp. 



518. P. muhlenbergiae Arth. and 



Holw. — III, on Muhlen- 



bergia mexicana. 



Manhattan, Kans., Dec. 5, 



1889, M. Varney. Dupl. 1902 



Myc. Ex. 127b as P. windsoriae. 



519. P. muhlenbergiae Arth. and 



Holw. — III, on Muhlen- 

 bergia mexicana. 

 Stockton, Kans., Oct. 13, 1897, 

 E. Bartholomew. 



520. P. muhlenbergiae Arth. and 



Holw. — III, on Muhlen- 

 bergia mexicana. 

 Stockton, Kans., Oct. 14, 1910, 

 E. Bartholomew. Dupl. N. A. 

 Ured. 49. 



521. P. obscura Schr. — II, on Luzula 



parviflora. 

 Bremerton, Wash., July 31, 

 1912, E. Bartholomew. 



522. P. obtecta Pk. — III, on Scirpus 



americanus. 

 Near Billings, Mont., Aug. 29, 

 1912, D. B. Swingle. 



523. P. obtecta Pk.— Ill, on Scirpus 



americanus. 

 Silesia, Mont., Sept. 11, 1913, 

 E. T. and E. Bartholomew. 

 Dupl. F. Col. 4365 ; N. A. Ured. 

 1261. 



524. P. obtecta Pk. — III, on Scirpus 



validus. 

 Wolhurst, Colo., Apr. 9, 1916, 

 E. Bethel. Dupl. N. A. Ured. 

 1663. 



525. P. obtecta Pk. — III, on Scirpus 



validus. 

 Wolhurst, Colo., Sept., 1916, 

 E. Bethel. 



526. P. oenotherae Vize — II and III, 



on Boisduvalia densiflora. 

 Berkeley, Calif., June 25, 1893, 

 W. C. Blasdale. 



