336 FIRST FORMS OF VEGETATION. 
tical agriculturists that wheat in the neighbour- 
hood of a berberry bush seldom escapes the 
blight. Long regarded by scientific men as a 
Y | 
Fic. 34.—ECIDIUM BERBERIDIS. 
(a) Branch of berberry with spots of rust. (4) Natural size. (c) A portion of the 
rust, highly magnified. (d@) Sporidia, highly magnified. 
prejudice of the bucolic mind, this theory has of 
late received remarkable confirmation by the dis- 
