; 139 
BRIEFER ARTICLES 
be 
: i ‘Boe 
. : f Uncinula; 4, 
i RAPE VINE; @ showing usual infection o 
EAVES OF G ; 
ction, by crawling animal. 
Fic, 
showing infe 
as kindly pre- 
The Photograph from which the figures heats ee The 
pared by Mr. M. B. Griffith of Columbus, Ohio.— F. 
University of Chicago, 
A NEW SILPHIUM. 
Silphium tan 
Slabrous, striate 
at Or near th 
late in outli 
Ut Coarse, somew 
: very 
: involucres 
Facteate at base and bibracteate an inch or two above 
Smooth, the ou 
d 
T oblong an 
ter scales orbicular, the inner (hres a Bardi broadly 
‘wice as long as the Outer, obtuse and thin at summit: 
