COLO. AG.EXPT. STA 
PLATE III.—Vertical section through a Winesap apple showing the very deep calyx tube 
meeting the seed cavity, which is darkened by the fungus (upper figure). 
(a) Young apples, fallen from the tree, showing the Alternaria after being kept in moist 
chamber, (b) Young apples and a fruit spur blackened with the fungus, after remaining 
on the tree over winter. 
Leaf of Keiffer pear affected with the Alternaria (lower figure). 
