321 



D. eumorpha, (B. & C.) 



Sphcrria eumorpha, B. & C. Grew IV, p. 145. 

 Sphcerella eumorpha, Cke. Journ. Bot. 1883. 

 Didymella eumorpha, Sacc. Syll. 2191, Cke. Syn. 4420. 



"Linear, closely surrounded by the cuticle, opening with a narrow 

 slit. Asci linear. Sporidia uniseriate, -short-oblong or cymbiform, 12- 

 15x3 //, uniseptate." 



On culms of Arundinaria, South Carolina, 



D. hyperborea, (Karst.) 



Sphczria hyperborea, Karst. Fungi Spetsb. No. 42. 

 Didymella hyperborea, Sacc. Syll. 2148. 



Perithecia scattered, hypophyHous, sunk in the parenchyma of 

 the leaf and covered by the blackened epidermis which is at length 

 ruptured, subsphaeroid, collapsing to cup-shaped, pierced with a very 

 minute orifice, black, when moistened brownish-black, glabrous, smooth, 

 about 250 // diam. Asci clavate-cylindrical, subsessile, 90-100 x 11- 

 12 //, 8-spored. Sporidia uniseriate, ellipsoid, uniseptate, hyaline, 

 14-17 x 7-8 ft. Paraphyses filiform, guttulate, slender. 



On Cassiope tetragona, Ameralik, Greenland. 



D. pteridicola, (B. & (.) 



Spharia pteridicola, B. & C. Grev. IV, p. 145. 

 Didymella pteridicola, Sacc. Syll. 2195, Cke. Syn. 4424. 



" Perithecia forming little gray, parallel lines, covered with the 

 cuticle. Asci clavate. Sporidia oblong, slightly curved, obtuse at 

 each end, uniseptate, 15 ft long." 



On stalks of Pteris. 



D. Catariae, (. & E.) 



Sphczria Catarics, C..& E. Grev. V, p. 95. 

 Didymella Cataricz, Sacc. Syll. 2175, Cke. Syn. 4402. 



Perithecia scattered, covered by the epidermis, slightly promi- 

 nent, depressed-globose, 150-200 fi diam., with a papilliform ostiolum. 

 Asci clavate, 55-80 x 12 fi, paraphysate. Sporidia biseriate, narrow- 

 elliptical, slightly curved, ends obtusely pointed, hyaline, uniseptate, 

 15-18x6-7// (20x8//, Cke.) 



On dead stems of Nepeta Cataria, New Jersey, Ohio and Canada. 

 Closely allied to the next species. 



Species imperfectly known. 



D. incommiscibilis, (B. & C.) 



Sphczria incommiscibilis, B. & C. Grev. IV, p. 151. 

 Didymella incommiscibilis, Sacc. S3-II. 2176, Cke. Syn. 4403. 



41 



