31 



Now let us turn to the consideration of the systematic position of 

 the present species. From the lack of authentic specimens we are by 

 no means sure that the fungus in question is identical with Usiilarjo 

 virens of Cooke, but the main characters of this species agree so closely 

 with the description of his species that we may consider them to be 

 probably identical. On close examination, however, we are led to the 

 conclusion that the present species does not belong to Ustilago. 

 Professor Shirai of our College is of opinion that it may be safely 

 placed in the genus Sphacelotheca first founded by de Bary. (1) 

 Indeed, the presence of the permanent stroma, of the central columelTa, 

 and of the enveloping wall, are the chief characters which separate this 

 genus from all other genera of this order ; and the present species 

 possesses all these characters. The mode of germination differs a 

 little from the typical fungus described by de Bary, but the generic 

 characters may reasonably be modified so as to comprise this second 

 species. And so this fungus may be called " Sphacelotheca virens." 



Botanical Laboratory of the College of Agriculture, 

 Imperial University, March, 1896. 



Phanerogams of Shdnai. 



{Continued from No. 108) 



By 

 T. Kawakami. 



& ft M 53 € fi %o (««'«*) in ± at ■ 



Piperaceae. 



630. Saururus Loureirii, Decne. ^yVfri/^p M^M GfeHlllSt — * 



631. Houttuynia cordata, Th. V? $t % (hV^t*^f) Jfrlt 

 (1J de Bary, Vergl. Morph. u. Biol. d. Pilze, etc, 3884. 



