514 The Botanical Gazette. [December, 
laboratory, who was the first to observe in cultures of this 
material a clear white fungus which on examination was found 
to be very similar to Van Tieghem’s Disptra cornuta and was 
provisionally so named. The form was subsequently culti- 
cation the appearance of a closed umbrella, gradually sepa- 
rate as they grow older, so that at maturity it becomes shaped 
like the letter ss 
The American species, however, shows important differ- 
ences In several essential points of structure, and although its 
general habit is similar, it is very evidently falsely dichoto- 
mous, one of the main divisions of the fertile hypha being 4 
lateral outgrowth (fig. 2) below the base of the other, which 
is thus in reality a terminal modification of the primary axis. 
The same false 
metry, the fructification differs in that it does not undergo 
the characteristic change of position above described. The 
