315 



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

 resembling a small Sderotium. Asci very soon dissolved. Sporidia 

 22 X 9 //. 



On leaves of Arundinaria, 8outli Carolina (Ravenel). 



DIDYMELLA, Sacc. 



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



Perithccia covered, membranaceous, globose-depressed, minutely 

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

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

 line. Differa from SjAverella in the presence of paraphyses. The 

 perithecia also aie mostly larger and firmer. 



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

 p. 232. 



Perithecia irregularly but thickly scattered, buried in the bark, 

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

 papilliform ostiola, white inside, globose, about \ mm. diam. Asci 

 clavate-cylindrical, 75-90 x 12-15 //, with abundant paraphyses. Spo- 

 ridia crowded-biseriate, cylindrical, obtuse, hyaline, 4-nucleate, con- 

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



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



D. Mkii, E. & E. 1. c. 



Perithecia scattered, about ^ 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-nucleate, not constricted, 

 20-22 x 3 pi, ends acute. 



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



Newfield, N. J. 



D. recMens, (Cke. & Hark.) 



SphisHa recedens, Cke. & Hark, Grev. IX, p. I3o<non Niessl). 

 Didymella recedens, Sacc. Syll. 2140, 

 Endophlcea recedens, Cke. Syn. 4126. 

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



Perithecia gregarious, minute, covered liy the pustulately raised 

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

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



On bark of Eucalyptus, California. 



