351 



1905; 12:17. 1906; 13:198. 1907; 14:16. 1908; Mycol. 2:227. 1910; 

 4:18. 1912); Freeman & Johnson (Bur. PI. Ind. U. S. D. A. Bull. 216. 

 1911); Stakman (Minn. Exp. Sta. Bull. 138. .1914; Jour. Agr. Research 

 4:193-199. 1915); Stakman and Piemeisel (Jour. Agr. Research 6:813- 

 816. 1916; 10:429-495. 1917). 



80. PUCCINIA PODOPHYLLi Schw. Schrift. Nat. Ges. Leipzig 1:72. 1822. 



On Berberidaceae : 



PodophyUuni pcltatum L., Newark, May 1890, F. D. Chester, 

 May 15, 1906, I, (1621), June 19, 1907, III, (1660) ; Hocke.ssin, 

 May 5, 1913; C. 0. Houghton. 



81. PucciNlA POLYGONI-AMPHIBII Pers. Syn. Meth. Fungi 227. 1801. 

 Aecidium Geranii-viaculati Schw. Schr. Nat. Ges. Leipzig 1:67. 



1822. 



Aecidium Sanguinolentum Lindr. Lot. Nat. 1900:241. 1900. 

 On Geraniaceae: I. 



Geranium maculatum L., Wilmington, June 29, 1893, A. Com- 

 mons (2099). 

 On Polygon aceae : II, III. 



Persicaria muhlenbergii (S. Wats.) Small {Polygonum emersuni 

 (Michx.) Britton), Wilmington, Aug. 17, 1886, A. Commons 

 (297). 

 Persicaria pennsylvanicum (L.) Small {Polygonum pennsyl- 

 vnnicum L.), Newark, Sept. 17, 1890, F. D. Chester. 

 Dr. Tranzschel first showed (Centr. f. Bakt. 11^:106. 1903) that 

 this species on Polygonum was connected with Aeciditim Sanguinolentum 

 on Geranium sp. These results were confirmed in America by Arthur 

 (Jour. Myc. 11:59. 1905) who used aeciospores from Geranium macu- 

 latum to inoculate Polygonum emersum. Uredinia and telia developed 

 from this culture. In 1905 (Jour. Myc. 12:18. 1906) these results were 

 confirmed by successfully sowing teliospores from Polygonum emersum 

 on Geranium 'maculatum resulting in the typical aecia of A. Sangiiino- 

 lentiim. These results prove that the European and American rusts 

 referred to this species are identical. 



