2i8 ¥J«->MWff'3i:^?fe+i -W^olau^X^yiJAJi^JJe^-c 



III 19 1 3, Mavok" recorded this species oti F.upatoriiim viacrophvlhim L. collect- 

 ed in Columbia. But, these specimens have the uredostage only. 



In 1905, DiKTEL^^ described a rust fungus on Ilupatorium japoniaan Thunb. 

 collected by S. Kusano in Nikkö as CoIedHporiuin Sctiecionis (Peks.). In 1908, 

 Miura" flescribcd a fungus on liupatorimn sachalinense Mak. (he misidentified 

 this host plant as fjipatoriiiiit japoniann Tiiunb.) collected by G. Y.vmada at Ma- 

 ruyama near Sapporo in October, 1896 and Yuni, prov. Ishikari in September, 

 1899. as a new species, CoUosporium Vaviadai i\IiiKA in his graduation thesis. 

 But his paper has not >'ct been [jublishcd in any form. Fujikuko*^ identified 

 a rust fungus parasitic on Eupatoritiiii chinensis L. var. tripartitum Myc. collect- 

 ed in Formosa with Coleosporium Hiipatorii Arth. 



In 1923 to 1926, the writer collected plenty of Colcosporiuin on Eupatorium 

 j'aponicwn or R. saclialiiiense at several places in Hokkaido and Sukayu, prov. 

 Mutsu, Honshu. After a careful examination, the writer found the fungi on Eii- 

 patoriiiyn japoniium and /;. saclialincnse collected by him to be exactly identical 

 with Coleosporium Eupatorii Arth. and Miura's Coleospormm Yatnadai. In the 

 summer of 1923, the writer observed that many individuals of Eupatorium sa- 

 chalinense had been se\erly attacked by the fungi in a plantation-forest of Pinus 

 koraicnsis Sieb, et Zucc. at the foot of Mt. Moiwa near Sapporo. In the early 

 spring of the next year, the writer fortunately discovered the appearance of sper- 

 mogonia of Coleosponuw-type on two year old needles of Pinus koraiensis at 

 the same locality. Then, in ]\Iay the same year, he found formation of the 

 Peridermium-typc aecidia on the same leaves. When the writer examined this 

 fungus, the idea at once aiose in his mind that this Perider/niu>n-type aecidia 

 might be a stage of Coleosporium Eupatorii Arth. on Eupatorium sachalitieiise 

 which had been collected at the same place in the summer of the previous 

 year. So the writer collected Peridermium on Pinus koraiensis for the inocula- 

 tion experiment on May 19. A spore suspension of the aecidiospores was made 

 from the fresh sori taken from the leaves of the Korean pine and sprayed in 



1) Mem. Soc. Neuch.itel. Sc. nat. V, p. 552 (1913). 



2) Engl. bot. Jahrb. XX.VIV, p. 107 (1905). 



3) Conlribution to the knowledge of the Uredinales parasitic on the Compositae of Japan (Gradua- 

 tion thesis of College of Agriculture, Töhoku Imperial University, 190S). 



4) Transact. Formosa Nat. Hist. Soc. XIX, p. 9 (1914). 



