Observations on the Perithecial Stage of the American Gooseberry-mildew (Sphaerotheca mors-uvae (Schwein.) Berk.)

Abstract

So far as I am aware, the manner of the dehiscence of the perithecium of Sphaerotheca mors-uvae has not hitherto been described. Although in the main features the process of dehiscence is very similar to that which I have described for Erysiphe Graminis and for Sphaerotheca Humuli, some new points of interest have been observed.