437 
tion was arrested. After the ae has entered the root it 
gradually extends for three or four inches up the stem, and 
also passes into the sheaths surrounding the base of the stem. In 
addition to permeating the tissues, the mycelium also develops ¢ on 
Explanation of the figures. 
Fig. 1.—The mts geen of the fungus at the —— of oat plants. Nat. size. 
» 2—Fungu eaf-sheath. Slig htly mag 
e 2. Pesan, or fruit of the fungus. ies 
» 4.—Ascus with = res escaping. Mag 
» Spore. Mag 
27089 C3 
