242 
S. ITÖ. 
ROSTRUPIA Lagerh. 
1 . Rostrupia Elymi (West.) Lagerh. in Journ. de Bot., 3 , 1889, (185); 
Sacc., Syll., 9 , 1891, (316). 
Syn. : Puccinia Elymi West., in Bull. Brux., 1851, (408); Sacc., Syll., 
7 , 1888, (656). 
Puccinia triarticulatci Berk, et Cult., North Pacific Exped. 
n. 130; Sacc., Syll., 7 , 1888, (732). 
Hab. On Elymus arenarius L. 
Hokkaido. — Prov. Kitami : Oshidomari (III. July 21, 1899. T. Kawakami) ; Kutsugata (II. & 
III. Sept. 2, 1899. T. Kawakami); Wakkanai (II.-& III. Aug. 17, 1894. K. Miyabe); Rebun-Island 
(III. Aug. 23, 1S94. K. Miyabe) ; Rishiri- Island (II. & III. Aug. 20, 1907. M. Miura). — Prov. Shiri- 
beshi: Shiribetsu (II. & III. July 28, 1897. G. Yamaha) ; Kitamura (III. Sept. I, 1905. K. Miyabe). 
— Prov. Iburi : Mororan (III. Aug. 3, 1900. G. Yamada). 
On Elymus Sibiriens L. 
Hokkaido. — Prov. Shiribeshi : Shikuzushi (III. Oct. 7, 1897. K. Miyabe)- — Prov. Kitami: 
Rishiri-Island (II. A III. Aug. 20, 1907. M. Miura). 
Distrib. Europe, North America and Japan. 
REMARKS. The present genus was found by Lagerheim in 1889 after 
the name of the eminent mycologist, E. Rostrup. 
We have in Japan three species of this genus ; viz., Rostrupia Dioscorece 
Kom., R. Elymi and R. Miyabeana n. sp. 
In 1S51, WESTEND described for the first time Puccinia Elymi on 
Elymus arenarius. When comparing our species with the descriptions of 
the fungus, I have found two points of difference. 1. The positions of the 
uredosori and teleutosori are just, reverse to the descriptions. 2. The 
teleutospores are one septated and are provided with hyaline pedicels, while 
in our cases they are many septated and furnished with colored pedicels. 
The description of Puccinia triarticulata on Elymus mollis, collected 
on the American side of the Behring strait by CHARLES WRIGHT, is too 
brief to identify our plant with it. But from the characters there given and 
the relation of the localities, our fungus may safely be regarded as the same 
species as the Behring plant. 
In 1889, LÄGERHEIM united them under the present name. The fungus 
