HiRATSUKA : On Two Si'ECIES of Coleosporiiun Parasitic on the Japanese Comi'OSit.e 2 I9 



the laboratory by means of an atomizer on the leaves of Eiipatorium sachalinense 

 which were transplanted from the southern side of Mt. Moivva about 7 kilometers 

 distant from the plantation of the Korean pines. The inoculated plants in pots 

 were then covered with bell jars and placed in a room where the temperature 

 ranged between 9° and i6°C. After two days, the bell jars were removed and 

 the plants kept well watered. After 9 days (May 26), uredosori began to ap- 

 pear here and there on the leaves of Eupatüritmi sacIiaUnense, while none of the 

 control plants showed any signs of the appearance of uredosori. About two weeks 

 after inoculation, numerous uredosori covered the inoculated leaves, and after 

 three weeks or more the teleutosori appeared on the same leaves. 



II. Coleosporium Saussureae Thumen 



In 1880, Thumen^^ collected the uredostage of a Coleosporium on an un- 

 determined species of Satissurea in Siberia and named it Coleosporium Saussureae 

 Thüm. Then, in 190S, Dietel*' described a new species, Coleosporium Satissureae 

 Diet, on Saussurea Japonica DC. collected in prov. Tosa by T. Yoshinaga, and 

 he^ also identified the fungi on Saussurea Maximorviczii Herd, at Nikkö and 

 ^. ussuriensis Maxim, on Mt. Takao collected by S. Kus.\no as the same species. 

 Miura'^ says in his graduation thesis that Dietel's species is distinguished from 

 that of ThOmen (the differences between them were not discussed in it), and 

 the former can not be called Coleosporium Saussureae Diet', by the rule of no- 

 menclature, so he adapted a new name, Coleosporium japonicuvi MiuR.'\ by him. 



In 1914, Tkanzschel''^ reported in his paper, Coleosporium Sausstireae Thotvi. 

 on Saussurea Tilesii Ledeb. collecteil ia Kamchatka. P. & H. Sydow*^ in their 

 monograph, described Japanese species, Coleosporium Saussureae Diet, as a 

 synonym of Coleosporium Saussiircae Tiiüm. in 1915. 



The writer examined many specimens of Coleosporium parasitic on several 

 species of Saussurea which were preserved in the Herbarium of Hokkaido Im- 



i) Bull. Soc. Imper. N»t. Moscou, LV, p. 212 (1880J. 



2) Engl. bot. Jahrb. XXXIV, p. 588 (1905). 



3) Ibid. XXXVII, p. 107 (1905). 



4) I- c. 



5) Die Pilze und Myxomyceten Kamtscliatka's, p. 552 (1915). 

 6J Monographia Uredinearum III, p. 614 (1915). 



