Oct. wis/] k, MIYABE.—ON CHRYSOMYXA EXPANSA. 



of 1913, the author collected the fungus at the isthmus of the 

 Peninsula Oyakot in the Lake Kutcharo. The spots as well 

 as the sori had already become blackened. 



In Prov. Tokachi the only specimen we have is from Alt. 

 Memoro collected by Mr. S. Nishida on July 22, 191-A. The 

 most of the sori presented an appearance that the spores had 

 already sprouted. In the Prov. of Hidaka, it was collected by 

 Mr. KiNGO Kondo on Alt. Apoi as well as at Samani in the 

 month of August in 1912. The sori had all fused together, 

 and some even had already dropped off. On April 1, 1913, 

 Prof. Y. Niijima collected it at Fuyushima, Samani. The 

 leaves shew simply the yellowish spots, on which the formation 

 of the uredo-sori had not apparently taken place. 



In Prov. Ishikari all the specimens we have in our Herba- 

 rium are from the Kamikawa- and Sorachi-gun. Mr. Hideo 

 Koizumi collected it in the spruce forest zone on Mt. Ishikari- 

 dake in the middle of July in 1911. The spores had just ger- 

 minated, and the sori still retained their characteristic forms. 

 But by far, the most beautiful specimens of the fungus we have 

 on hand, are those collected by Mr. Naoji Hiratsuka in the 

 spruce forest near Ochiai on June 12, 1907. The sori were fu Un- 

 developed, and only a few of them showed a slight powdery 

 appearance on their surface, indicating the germination of the 

 spores had just begun to take place. In the same locality, the 

 author himself collected the fungus on Oct. 9, 1908 and July 

 28, 1912. The sori in the latter case had then all fused to- 

 gether into irregular masses, and some even had already drop- 

 ped off. 



Among the hosts of the fungus in question Rhododendron 

 chrvsanthum Pall. (10, 13) should also be included. Last year 

 toward the end of June, Mr. Bunzaburo Ishida of our 

 College Botanic Garden ascended a mountain called the 

 Sapporo-Dake to collect living alpine plants for cultivation. 

 Among the collection, there were several clumps of J\. chrysan- 

 thum, on the leaves of which we found not only the teleuto- 

 but also a few uredo-sori. 



From the foregoing statements, we mav infer that the ger- 



