ON A DISEASE OF SOME LEGUMINOUS PLANTS 

 CAUSED BY Ceratophorum setosum KIRCHNER 



By 



Takewo Hemmj 



(With Plate II) 



•^^^^^^^^^•^ 



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m. ^ K m 



1. Introduction 



In Hokkaido, Lupinus polyphyllus, known by the name oi Hauchiwa-mame or 

 Tachifiiji, 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 very 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. 

 F'uKUSHi 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 tlie subject have not only led us to recognize the fungus to be Ceratophoruvi 

 setosum Kirchner of Dematiaceae which has yet been known as a parasite on the 

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

 Sorauer oi Melnnconiaceae is identical in cv^ery respect with the present fungus. 



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

 of the Cytisus-\Q2i\f&s in the summer of 19 17, we collected the fungus in question 

 affecting the leaves of Cytisus capitaUis 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 Soc. Vol. VII, Part 2, Feb. 1919I 



