ON A DISEASE OF SOME LEGUMINOUS PLANTS 

 CAUSED BY Ceratophorum setosum KIRCHNER 



By 

 TaKKWO IIlCMMI 



(With Plate II) 



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1. Introduction 



In Molckaido, Lnpimis polyphyllus, known b)' the name o{ Hanchhüa-mmne or 

 Tacliifuji, is commonly cultivated as an ornamental plant. A destructive disease? 

 of the leaves and sometimes petioles of this plant, due to a Hyphomycetous fungus, 

 is common in the vicinity of Sapporo and veiy probably also in other districts, 

 where the plant is cultivated. So far as I know, it has never been described, 

 although the disease has been recognized by us and some studies have already 

 been done in our laboratory since the summer of 1915. The investigation on this 

 subject was at first undertaken by the writer, partly with the assistance of Mr. T. 

 FuKUSHi in order to identify the specific name of the causal fungus and to make a 

 close observation of it's pathogenetic characters. Our observations in the field, 

 the experiments in the laboratory, as well as the studies of the literature relating 

 to the subject have not only led us to recognize the fungus to be Ceratophorum 

 sclosTLin Kirchner of Dcniaiiaccae which has yet been known as a parasite on the 

 leaves of some Cytis7cs, but to prove at the same time that Pcstalozzia Liipini 

 Sorauer of Mdanconiaceae is identical in every respect with the present fungus. 



By a careful search in the Botanic Garden of our University for the disease 

 of the O'/wwJ-leaves in the summer of 1917, we collected the fungus in question 

 affecting the leaves of Cytisus capitatns and one other species of the same genus 

 as well as those o{ Lupinus polvphylhis. The writer isolated the fungus from each 



[Trans, of .Sapporo Natural History See. Vol. VII, Part 2. Feb, 1919.I 



