i go 
s. ITO. 
author (8) as a distinct species on account of the dense aggregation of ALcidia 
in a larger group, and of the larger size of aecidiospores. He named it 
JEcidium Rhamni japonici. Infection experiment ought to be performed in 
order to settle the question, whether the iridium on Rhamnus japonicus has 
a genetic relation to Puccinia himalensis or not. 
At Jozankei, near Sapporo, Mr. KASAI collected a coronate Puccinia on 
the leaves of certain grass which does not belong to Brachypodium. The 
general character of its teleutospore coincides morphologically to those of the 
present species. 
4 . Puccinia Diarrhenae Miyabe et Itö. n. sp. — (PI. X. Fig. 6.) 
Teleutosori , 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. 
Uredospores, obovate, subglobose or globose, verrucoso-echinulate, light 
brownich yellow or hyaline, 20-26.5 x 16-23.5//; epispore thin (1-2//). 
Teleutospores, oblong-clavate, ellipsoidal or fusiform, apex slightly 
thickened, with numerous blunt, rather short horn-like (6-1 7// 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//; epispore rather thin; pedicels hyaline or light yellowish 
at the upper portion, as long as the spore in length, persistent. 
Hab. On Diarrhena japonica Fr. et Sav. 
Honshu. — Prov. Rikuchü : Morioka (III. Oct. 21, 1906. G. Yamada). — Prov. Uzen : Mina- 
mura (III. Aug. 25, 1903. Y. TakaHAshi). 
Distrib. Japan. 
Remarks. The occurrence of Puccinia on Diarrhena sgems never to 
have been recorded so far. In our country, the present host-plant, Diai'r- 
hena japonica Fr. et Sav. is widely distributed though not common. The 
specimens of the fungus we have examined are only two in number, and in 
both of them the uredosori could not be found. Only a few of the uredo- 
spores we have observed were intermixed with the teleutospores. Among 
many coronate species of Puccinia on Gramineae there are none provided with 
