346 BOTANICAL GAZETTE. 
Notes on Some Injurious Fungi of California.’ 
By We G. FARLOW. | 
climated in Mexico, and is occasionally cultivated in the green- 
houses of our Northern States. Within a few years it has es- 
caped from cultivation in California and is now a common road- 
side plant from San Diego to Los Angeles and Santa Barbara, 
and also occurs, but less commonly, still further to the north. 
While in San Diego I noticed that the leaves of the Nicotiana 
were badly attacked by a fungus which formed large grayish- 
black spots on both sides of the leaves. The spots were often 
two inches in diameter, and sometimes even larger, and the etr- 
cumference was irregular but sharply limited, so that the transi- 
tion from the healthy to the diseased leaf tissue was sudden. 
Since it is well known that the species of Peronospora attack 
different species of flowering plants which belong, sen 
ease. The fungus was only observed by me at San Diego, ‘ 
was abundant there. Whether it occurs in Mexico or not I 
Eran eer aR THeONbC Nh Bem : 
"Read before the American Association for the Advancement of Science, August as a 
