424 



D. rhoina, (C. & E.) 



Dialrype rhoina, C. & K. Grev. Vlt, p. 8, Cke. Syn. 1^23. 

 Calospora. rhoina, Sacc. Syll. 3707. 

 Kxsicc. Ell. & Evrht. N. A. F. 2d Ser. 1953. " 



Peritliecia sul)ciiciiiate, 8-20 in a group, globose, \-\ mm. diam,, 

 the lower part sunk in the wood, necks convergent and erumpent in a 

 compact fascicle of stout but short, cylindrical ostiola, which perforate 

 the epidermis, but <lo not rise much above it, their tips rounded or 

 obtusely conical, and finally with a large irregular opening. Stroma 

 variable, orbicular, irregular in outline, often widely confluent and con- 

 tinuous for several inches, faintly circumscribed. Asci oblong-clavate, 

 p. sp. 60x8-10 II.. Sporidia biseriate, oblong-fusoid, 2-4-nucleate, 

 becoming uniseptate and slightly constricted, 12-15 x 2|-3 /.<. 



On dead Rhus, venenata, Newfield, N. J. 



On a section exposing the perithecia they seem to lie almost 

 evenly scattered. Sec. Cooke, the sporidia are l~5-septate, 40 x 4 ;/, 

 but -nc can only 'find them as stated above. 



D. acerina. (Pk.) 



Valsa acerina, Pk, 2Sth Rep. p, 74, 

 Diaporthe acerina, Sacc. Syll. 2365. 

 Valsa albocincta, C, & P. in Cke. Valsei of the U. S. No. 64, (fide Peck). 



Perithecia sunk in the wood, \-\ \\\m. diam., in subcircinate 

 groups of 6-10, circumscribed by a black line which penetrates deeply 

 into the wood and encloses a space considerably larger than that occu- 

 pied by the perithecia. Ostiola erumpent through the ruptured epi- 

 dermis (which is also slightly raised), stout, short-cylindrical, obtuse, 

 perforated, enveloped in a aulphur-yellow, gTumous substance which 

 finally disappears. The wood of the stroma within the circumscribing 

 line is also tinged sulphur-yellow. Asci oblong-fusoid, p. sp. about 

 60x8-10 ji. Sporidia biseriate, oblong or subelliptical, subobtuse, 

 12-15x4 n, uniseptate and constricted. 



On dead Acer spicatum, Indian Lake, N. Y. (Peck), London, 

 Canada (Dearness). 



D. eiisticha, E. & E. (in Herb.) 



Perithecia small {\ mm. diam.), buried in the unaltered substance 

 of the inner bark in groups of 8-12, the ostiola converging and seriate- 

 erumpent in a black, convex-hemisplierical disc which is loosely sur- 

 rounded by the ruptured epidermis. Asci clavate, 40-50x6-7 fi. 

 aparaphysate, 8-spored. Sporidia biseriate, cylindric-fusoid, 4-nucleate, 

 hyaline, !*traight, uniseptate, scarcely constricted, 12-15x3-3 J //-, 



