^'ouil fortune to o'et from the College Herbarium the very specimen (Xo. 92) collected 

 by Prof S. KUSANO at Mt. Takao, Prov. Musashi, on Jnne 11, 1899, which 

 DIETEL reported upon as Ph. subcorticium (Schrank.) Wiut. in 1901. Under the 

 micrcscope the above mentioned specimen showed to be nothing but Ph. Rosae- 

 tiiuUißorae Diet. At the time of describing Ph. Eosae-nmUiflorae Diet, in 1905, 

 DTETEL did not give us the date and locality for the specimen, on ^yllicll he 

 founded tliis new species. He only mentioned KUSxYNO, the collector's name. 

 This fact makes it probable, that DiETEL used the same specin\en in both occasions. 

 As regards the existence of Ph. Fragariastri (DCj Schroet. in Japan, frequent 

 references are met with in our literature. Both kinds of specimens on which P. 

 Hennings made his report have been also in our possession While I was engaged 

 in the study of those specimens they appeared to u.s upon examination to differ in 

 no way from PuGciniastrmn Potentillae Kom. This fact dre^v us on to a further 

 study and closer examination of the above named Pucciniastrum. In the course of 

 my study my attention was directed to DiETEL's remark under Pucciniastrum Poten- 

 tillae Kom., in his Uredineen Japonicte VI. (p.l()5j, where lie clearly sets down as 

 follows ; namely "Es ist dies Pilz (Pucciniastrum Potentillae Kom.), der von P. 

 Hennings in Fungi japonici IV als PJi. Fragariastri (DC.j Schroet. aufgefulirt 

 ist." This remark of DiETEL fully agrees witli and corroborates what I had found 

 to be the fact. Under Ph. Poteniillac fPers.) Karst., I have already said that in 

 our country Pli. Fragariastri (DC) Schroet. has not yet ' been found. 



HOST-INDEX. 



1. Potentilla L. 



Potentilla cJiinensis Ser. Phraginidium Potentillae (Pers.) Karst. 



Potentilla cryptotaeniae Maxim ,, 



Potentilla Dickinsii Er. et Sav ,, 



Potentilla gelida C. A. Mey „ 



Potentilla Kleiniana. W. et A ,, 



2. Rosa Tourn. 



Rosa acicularis Lindl PhragmicKum fimforine Sciu'oet. 



Rosa clahurica Pall Ph. americanum (Pk.) Diet. 



Ro.m leievigata Mich Ph. Rosae-multißorac Diet. 



Rosa luciae Pr. et Roch. Ph. japonicuni Diet. 



