86 The Botanical Gazette. 
Subsequently its structure, as well as its disease-producig 
capacity and its means of dissemination and _ survival, hat 
been studied by Galloway, * Smith® and the writer.’ Var 
ous other accounts of its attacks, with recommendationss 
to the best means of avoiding them, have been publi Ne 
chiefly in experiment station literature, and need not be mot 
precisely quoted here. Neither need the results of s 
bearing on the prevention or avoidance of the ravages 0 
fungus be discussed, since our present concern is with 
structural relations. e 
The fungus, which, as Galloway!! and Smith’? have show 
may attack foliage and young branches, as well as fruits, 
appears externally in the form of ashy tufts. Each tuft com 
— 
i 
: 
P. 349. 
10 gt : vil, 36. 1890 and 1892. 
11 — Mass. Agr. Exp. Sta., Pp. 213: 1891. . 
