190 S. ITO. 



author (8) as a distinct species on account of the dense aggretjation of /Ecidia 

 in a larger group, and of the larger size of a;cicliospores. He named it 

 /Eddium Rhamiii japonici. Infection experiment ought to be performed in 

 order to settle the question, whether the v'Kcidium on RJiavinus japonictis has 

 a genetic relation to Pnccinia Iiinialensis or not. 



At Jözankei, near Sapporo, Mr. Kasai collected a coronate Puccinia on 

 the leaves of certain grass which does not belong to Bracliypodimn. The 

 general character of its teleutospore coincides morphologically to those of the 

 present species. 



4. Pitccinia Diarrliense Miyabe ct Itö. n. sp. — (PI. X. Fig. 6.) 



Telcntosoyi, epiphyllous ; minute or medium sized, oblong or round, 

 scattered or gregarious, sometimes confluent, loosely covered by epidermis, 

 soon after naked with the torn remains, somewhat pulvinate, compact, sooty 

 black. Uredospores are sometimes found intermixed in the sori. 



Uredosfiorcs, obovate, subglobose or globose, verrucoso-cchinulatc, light 

 brownich yellow or hyaline, 20-26.5 X 16-23.5// ; epispore thin (1-2/^). 



Tdciito spores, oblong-clavate, ellipsoidal or fusiform, apex slightly 

 thickened, with numerous blunt, rather short horn-like (6-17//. in length) or 

 wart-like processes, base mostly attenuated, not or slightly constricted at the 

 septum, smooth, ferruginous at the apex, lighter colored toward the base, 

 25-52x10-21.5/7; epispore rather thin; pedicels hyaline or light yellowish 

 at the upper portion, as long as the spore in length, persistent. 



Hab. On DiarrJicna japonica Fr. et Sav. 



Honshu.— Prov. Rikuchü : Morioka (III. Oct. 21, 1906. G. Yamada).— rrov. Uzen : Miiia- 

 mura {III. Aug. 25, 1903. V. T.\kahasiii). 



Distrit). Japan. 



Remarks. The occurrence of Puccinia on Diarrlicna seems never to 

 have been recorded so far. In our country, the present host-plant, Diarr- 

 licna japonica Yk. et Sav. is widely distributed though not common. The 

 specimens of the Rnigus we have examined are only two in number, and in 

 both of them the urcdosori could not be found. Only a few of the uredo- 

 spores we have observed were intermi.xed with the teleutospores. Among 

 many coronate species of Puccinia on Gramincae there are none provided with 



