315 



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

 resembling a small Sclerotium, Asci very soon dissolved. Sporidia 

 22 x 9 fx. 



On leaves of Arundinaria, South Carolina (Ravenel). 



DIDYMELLA, Sacc. 



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



Perithecia 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. Differs from Sphmrella in the presence of paraphyses. The 

 perithecia also are 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 ft. 



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



D. Mali, 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 ft, with abundant paraphyses. Spo- 

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

 20-22 x 3 n, ends acute. 



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

 Newfield, N. J. 



D. recedens, (Cke. & Hark.) 



Sphczria recedens, Cke. & Hark. Grev. IX, p. 130 {non NieSsl), 

 Didymella recedens, Sacc. Syll. 2140, 

 Endophloca recedens, Cke. Syn. 4126. 

 Kxsicc. Thum. M. U. 1748 {in part). 



Perithecia gregarious, minute, covered by the pustulately raised 

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

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



On bark of Eucalyptus^ California, 



