9 



Sporidia more or less distinctly muriform, brown. Pleomassaria. 

 Sporidia as in Massariella, but perithecia 



circinate. Massariovalsa. 



CLYPEOSPHAERIEAE. 



Sporidia ovate-oblong, continuous, subhyaline. Trctbutia. 



Sporidia ovoid or oblong continuous, brown. Anthostomella. 



Sporidia oblong cylindrical, 1-3-septate, brown. Clypeosphaeria. 



Sporidia fusoid, 1-3-septate, hyaline. Hypospila. 



Sporidia filiform, hyaline. Linospora. 



Sporidia short fusoid, muriform (toliicolous.) Isothea. 



Sporidia subelliptical, muriform, hyaline or brown 



(lignicolous ) ' Thyridium. 



VALSEAE. 



A. Sporidia allantoid, continuous, hyaline or subhyaline, asci mostly 

 8-spored. 



* Stroma convex or conical, sunk in the matrix with only the 



apex erumpent. 



Ostiola smooth, sporidia hyaline. Valsa. 



Ostiola sulcate. sporidia yellowish. Eutypella. 



Perithecia circinate, asci polysporous. Valsella. 



** Stroma effused. 

 Perithecia scattered in an effused or subpulvinate 



stroma, sporidia hyaline. Eutypa. 



Perithecia scattered or subcircinate in a (mostly) 



cortical stroma, sporidia yellowish. Cryptovalsa. 



*** Stroma wanting. 

 Perithecia circinate on the surface of the inner 



bark. Calosphaeria. 



Perithecia as in Calosphaeria, asci polysporons. Coronophora. 



Perithecia and sporidia as in Eutypa, but stroma 



none. Cryj)tosphaeria. 



B. Sporidia 1-or more-septate. 



* Stroma convex, conical or effused. 



Sporidia uniseptate, hyaline. Diaporthe. 



** Stroma wanting. 



Perithecia buried, subcircinate or scattered, sporidia 



1-3-septate, brown. Endoxyla. 



MELANCONIDEAE. 



Sporidia uniseptate, hyaline or colored. Melanconis. 



