List of Fungi Prepared for Exchange. 



31 



527. P. ornata Arth. and Holw. — III, 



on Rumex britannica. 

 Orono, Me., Oct. 17, 1900, P. L. 

 Picker. 



528. P. osmorrhizae Lindr. — III, on 



Osmorhha claytoni. 

 Lancaster. Pa.. May 31. 1910, 

 E. Bartholomew. Dupl. N. A. 

 Ured. 51. 



529. P. osmorrhizae Lindr. — III, on 



Osmorhizn diraricata. 

 Messler's Ranch, Mount Rai- 

 nier. Wash.. Aug. 27, 1901, E. W. 



D. Holway. 



530. P. panici Diet. — I, on Euphorbia 



hexagona. 

 Callaway, Xebr., June 11, 1902, 

 J. M. Bates. Dupl. F. Col. 1706. 



531. P. panici Diet. — I, on Euphorbia 



marginatn. 

 Stockton. Kans.. May 31, 

 1902, E. Bartholomew. 



532. P. panici Diet. — I, on Euphorbia 



marginata. 

 Stockton, Kans., June 5. 1911, 



E. Bartholomew. Dupl. F. Col. 

 3855; N. A. Ured. 250. 



533. P. panici Diet. — III, on Panicum 



virgatum. 

 Stockton, Kans., Oct. 12. 1897, 



E. Bartholomew. 



534. P. parkerae Diet, and Holw. — 



III, on Ribes lacustre. 

 Seattle. Wash.. June 5. 1894, 

 A. M. Parker and E. W. D. Hol- 

 way. Type coll. Dupl. N. A. F. 

 3242: X. A. Ured. 52; Tester.: 

 Micr. 562. 



535. P. patruelis Arth. — III, on Carex 



conjuneta. 

 Kulm. X. Dak., Mar. 24, 1912, 

 J. F. Brenckle. 



536. P. pattersoniae Syd. — III, on 



Tripsacum dactyloides. 

 Manhattan. Kans.. Dec. 5, 

 1889, M. Varney. Type coll. 

 Dupl. Syd.: Ured. 1729; 1902 

 Myc. Ex. 116b as P. sorghi. 



537. P. pattersoniana Arth. — II and 



III, on Agropyron spicatum. 

 Sandcoulee, Mont., July, 1888, 



F. W. Anderson. Type coll. 



537. P. pattersoniana — Continued. 



Dupl. 1902 Myc. Ex. 110a as 

 P. rubigo-vera, on Agropyron di- 

 ver gens. 



538. P. peridermiospora Arth. — I, on 



Fraxinus pennsylvanica lan- 

 eeolata. 

 Lincoln. Xebr.. June 5, 1898, 

 comm. M. A. Carleton. 



539. P. peridermiospora Arth. — I, on 



Fraxinus pennsylvanica Ian- 

 ceolata. 

 Lincoln, Xebr., June 8. 1898, 

 comm. M. A. Carleton. 



540. P. peridermiospora Arth. — I. on 



Fraxinus pennsylvanica ia?i- 

 ceolata. 

 Wirch Lake, X. Dak., June 6, 

 1908, J. F. Brenckle. Dupl. F. 

 Dak. 2. 



541. P. peridermiospora Arth. — II, on 



Spartina cynosuroides. 

 Xorth Beach, Md., June 27, 

 1919. W. W. Diehl. 



542. P. peridermiospora Arth. — II 



and III, on Spartina cynosu- 

 roides. 

 Xorth Beach, Md., July 30, 

 1919, W. W. Diehl. 



543. P. peridermiospora Arth. — III, 



on Spartina michauxiana. 

 Manhattan, Kans., Apr. 3, 

 1889, W. A. Kellerman. 



544. P. peridermiospora Arth. — III. 



on Spartina michauxiana. 

 El Reno. Okla.. Dec. 25. 1909. 

 W. H. Long. Dupl. F. Col. 3354. 



545. P. peridermiospora Arth. — III, 



on Spai'tina michauxiana. 

 Stockton, Kans., Oct. 14, 1910, 

 E. Bartholomew. Dupl. X. A. 

 Ured. 739. 



546. P. petasitis Vester. — III, on Pefo- 



sites frigida. 

 Banff, Alberta. Canada. July 

 24, 1901. E. W. D. Holway. 

 Dupl. X. A. Ured. 1564. 

 547. P. phragmitis (Schum.) Koern. — 

 III, on Phragmites commu- 

 nis. 

 Callaway. Xebr., July 9. 1902, 

 J. M. Bates. 



