i6 



BOTANICAL GAZETTE 



[JULY 



spores, and also on Rheum ; later stages on Phragmites. Besides 

 many European specimens the following from America have 

 been examined : 



On Rumex crispus L. May, 1899, I, Lafayette, Ind. (cultivated by the 

 writer from teleutospores sent from Wisconsin and Nebraska.) 



On Rumex obfusifolius L. May, 1899, ^' Lafayette, Ind. (cultivated by 

 the writer from teleutospores sent from Wisconsin and Nebraska.) 



On Rhetim Rhapontictifn L, June, 1901, Kearney, Neb. (1822, /. M. 



Bates), 



o 



t 



u 





w 



(J 



Fig, 4. — P, rubella: s, five aecidiospores on Rumex obtusifolius^ zxi\Wv2!i^^\ A 

 four uredospores, and (w) two teleutospores, both on Phragmites. P, simillima: v, 

 three paraphyses from uredosori ; w, one uredospore ; x, four teleutospores, all on 

 Phragmites. P. Arundinariae : y^ four uredospores, the lowermost in transverse sec- 

 tion; z^ three teleutospores, both on Arundinaria. 



On Phragmites Phragmites {L.) Karst. {P. communis Tx\x\,) Aug. 1881, 

 III, McHenry, III (1325, A. B. Seymotir)\ Aug. 1881, III, Elgin, 111. (1368, 

 A, B. Seyniour)\ Oct. 1884, III, Mason city, la. {E. W, D. Holway)\ 

 Oct. 1885, III, Decorah, la. {E. W. D. Holway)-, July, 1886, IL III, Ver- 

 milion lake, Minn, (137, E. W. D, Holway) ; Oct. 1892, III, Coolidge, Kan. 

 (Carleton's Ured. Amer., 36, M, A. Carleton) ; Nov. 1893, HI, Wilmington, 

 Del. {A. Commons^', Apr. 1899, III, Racine, Wis. (partly used by the 

 writer for successful cultures on Rumex,/./. Davis) ; May, 1899, III, Lincoln, 

 Neb. (partly used by the writer for successful cultures on Rumex, C, E. 

 Bessey) ; 1901, III, Callaway, Neb. (1658, / M. Bates). 



