315 



vate. Sporidia biseriate, elliptical, hyaline, uniseptate. Externally 

 resembling a small Sderotium. Asei very soon dissolved. Sporidia 

 22 x 9 fji. 



On leaves of Arundinaria, South Carolina (Ravenel). 



DIDYMELLA, Sacc. 



Mich. I, p. 377, Sacc. Syll. i. p. 545. 



Perithecia covered, menibranaceous, globose-depressed, minutely 

 papillate, mostly growing on stems or branches. Asci 4-8-spored, 

 paraphysate. Sporidia ovoid, ellipsoid or suboblong, uniseptate, hya- 

 line. Differs from Sphv&rella in the presence of paraphyses. The 

 perithecia also arc mostly larger and firmer. 



D. Canadensis, E. & E. Proc. Acad. Nat. Sci. Phila., Pa.. July, 1890.' 

 p. 232. 



Perithecia irreirularlv but thickly scattered, buried in the bark. 



O . * 



which is slightly raised above them and pierced by the small, black, 

 papilliform ostioia. white inside, globose, about \ mm. cliam. Asci 

 davate-cylindrical. 75-90 x 12-15 n, with abundant paraphyses. Spo- 

 ridia crowded-biseriate, cylindrical, obtuse, hvaline, 4-uucleate, con- 



I fj C 



stricted in the middle, and, slightly so, near each end. 25-34 x 6-7 //. 

 On dead limits of Salix, London, Canada (Dearness). 



D. Mali, E. & E. 1. c. 



Perithecia scattered, about J mm. diam., buried in the substance 

 of the bark, except the emergent rather acutely conical ostiolum. Asci 

 clavate-cylindrical, about 70 x 7 //, with abundant paraphyses. Spo- 

 ridia biseriate, fusoid, slightly curved, about 4-nticleate, not constricted, 

 20-22 x 3 //, ends acute. 



On the inner surface of loose hanging bark of living apple trees, 



Newfield, N. J. 



D. recedens, (Cke. & Hark.) 



Sphferia recedens, Cke, & Hark. Grev. IX, p. 130 (non Niessl) 

 Didymella recedens, Sacc. Syll. 2140, 

 Endophlcea recedens, Cke. Syn. 4126. 

 Exsicc. Thum. M. U. 1748 (in part). 



Perithecia gregarious, minute, covered by the pustulately raised 

 epidermis, papillate. Asci elongated. 100 n long. Sporidia narrowly 

 fusoid, uniseptate, hyaline, 18-20 x 3 /;, the two cells easily separating. 



On bark of Eucalyptus. California, 



