Remarks. There are five species already recorded as parasitic on 

 Elyiiuis ; namely, Pitccinia ^raminis, P. gliunantm, P. inontanensis, P. 

 procrca and P. hnpatientis. Wc need not discuss here differences of the 

 present species and P. graminis and P . montancnsis, because they differ from 

 one another in many prominent points. Pitccinia ghittianmi, P. fij-ocrca and 

 P. ivipaticntis are rather related to our species in the general shape of teleuto- 

 spores. From Puccinia ghnnayum, it differs by having the uredosporc, whose 

 wall is brownish yellow in color, while it is hyaline or light yellow in Puccinia 

 gluinaniin. From /'. procrea, it differs in smaller uredospores, and 

 teleutosori. In the former species, the uredospore is very large, and the 

 teleutosorus is more remarkably so, measuring often i cm. in length, while in 

 our species, the sorus is only 1-5—3 mm. in length. Moreover, the telcutospore 

 of the former is larger than that of ours. From P. ivipaticntis it differs in a 

 fewer number of the germ-pores of uredospores and the telcutospore of this 

 species is longer than that of others. As there arc no species already 

 described which correspond exactly with our species I may be justified in 

 considering it as a new species. 



17. Puccinia sessilis Schneid., in Schroeter, Brand und Rostpilze 



Schles. in Abhandl. d. Schles. Ges. naturw. Abt. 1869, (19) ; Winter, Pilze, 



1884, (222) : Schroeter, Pilz Schles., 1SS9, (324) ; Dietel, in Engl., Bot. Jahrb., 



■27. 1900, (569); 32, 1903, (48); 32, 1903. (626); Henn., in Engl., Bot. 



Jahrb., 31, 1902, (732) ; Sydow, Monogr. Ured., 1, 1904, (781). 



Hab. On PJialaris arundinacca L. 



Saghalien. — Wendgishi (III. Aug. 18,1906. K. MlVAiiE & T. JIivagi) ; Makunkot.iii (III. 

 Sept. 15, 1906. T. MiYAKE) 



Hokkaido. — Prov. Ishikari: Ebetsu (III. Sept. 29, 1907. S. iTo). 



Honsli-ü. — Prov. Tokyo (II. & III. Oct. 26, 1899 ; III. Sept. 2, 1900. S. KusAXO). 



Kiushu. — Prov. Higo: Imizu-mura (II. May 15, 1904. S. YosHixo). 



Distrib. Europe, North America and Japan. 



Remarks. The present species w?s named by SCHNEIDER in 1891 but 

 described by ScHROETER(i) in 1869. Plowkigiit, Dietel and Klebahn 

 have found in Puccinia sessilis many biological species by infection experi- 

 ments ; they are as follows : — 



1. Puccinia Ari-Plialaridis {^\owci)\\\ch. 



2. P. Allii-Phalaridis Kleb. 



