321 



D. emu6l'pha, (B. & C.) 



SphcEria eumorpha, B. & C. Grev. IV, p. 145. 

 SpficErella eum.orpha,^Q.'k.&. Jouni. Bot. 1883. 

 Didymella eurhoi-pha., Sacc. Syll. 2I91, Cke. Syn. 442b. 



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

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

 15 X 3 /i, uniseptate." 



On culms of Arundinana, South Carolina^ 



D. hyperb6rea, (Karst.) 



SpfuSria hyperborea, Karst, F\in'gi Spetsb, No, 42, 

 Didymella hyperborea^ Sacc, Syll, 2148, 



Perithecia scattered, hypophyllous, sunk in the parenchyma of 

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

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

 minute orifice, black, when moistened bro*nish-blaclc, glabrous, smooth, 

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

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

 14-17 X 7-8 fi. Paraphyses filiform, guttulate, slender. 



On (Jassiope tetragona, Ameralik, Greenland. 



D. pteridicola, (B. & C.) 



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

 Didymella pteridicola, Sacc, Syll, 2195, Cke, Syn, 4444, 



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

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

 each end, uniseptate, 15 //long." 



On stalks of Pteris. 



D. Catariae, (C. & E.) 



Sphcsria Catarice, C. & E, Grev, V, t>, §5, 

 Didymella Cataritz, Sacc. Syll, 2175, Cke, Syn, 44b4, 



Perithecia scattered, covered by the epidermis, Slightly promi- 

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

 Asci clavate, 55-60 x 12 jx, paraphysate. Sporidia biseriate, narrow- 

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

 15-18 X 6-7 /i (20 X 8 /i, Cke.) 



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

 Closely allied to the next species. 



Species imperfecil:y Icnown. 



D. incoiumiscibilis, (B. & C.) 



Spharia incommisctbilis, B, & C, Grev, IV, p. 151, 

 Didymem incoihmiscibilis, Sacc, Syll. 2176, Cke. Syrt, 440J, 



41 



