328 



black ostiola, which ai-e surroimded below with a white fi-inge formed 

 from the laciniatelj' torn epidermis. Asci oblong, with a short stipe, 

 thickened at the apex, 8-spored, 40-50 x 8-10 fi. Sporidia biseriate, 

 ovate-elliptical, septate near the lower end, hyaline, 9-11 x 3^-4 /f. 



On leaves of Carpinus Americana, Rhode Island, Canada and 

 New York. 



D. Sporidia filiform {Cryptoderis). 



G. melaniistyla, (DC.) 



Sphceria melanostyla, DC. Flore Franc. VI, p. 129. 

 Gnomonia melanostyla, Awd. I^eipz. Tausch-Verein^ 1866, p. 4. 

 Gnomoniella^ melanostyltt, Sacc. Syll. 1591. 

 Exsicc. Fckl. F. Rh. 869.— Kze. F. Sel. 1 ts.— Rehnl Asc. 244.— Rab. F. fi. 744, 2O55.— Thuin . 

 jM. U. 265.— Sydow M. March. 157.— Krieg. F. Sax. 333.— Desm. PI. Crypt. Ed. I, 

 1788.— id. Ed. 2d 1438. 



Perithecia hypophyllons, thickly scattered, sunk in the parenchyma 

 of the leaf, finally erumpent, with an upright, straight and very long, 

 fusiform beak, depressed-spherical, black, about 300 n broad and 200 ji 

 high. Asci oblong-fusoid, stipitate-attenuated below, 8-spored, 55-60 x 

 4^6 n- Sporidia filiform, lying parallel in the asci, the upper part 

 swollen, hyaline, 36-42 x 1 /i. 



On leaves of Tilia, New York State (fide Peck) and Bethlehem, 

 Pa. (Schweinitz). 



G. Sassafras, E. & E. Bull. Torr. Bot. Club, X, p. 98. 



Exsicc. EU. & Evrht. N. A. F. 2d Ser. 1684. 



Perithecia hemispherical, erumpent, about 200 fi diam., scattered 

 over the lower surface of the leaves and along the midrib. Ostiola 

 filiform, 200-250 ji long, of fibrous texture, subhyaline above, a little 

 bent. Asci lanceolate, or nearly cylindrical, abundant, mostly curved, 

 50 x4 //, aparaphysate. Sporidia filiform, with a faint yellowish tinge, 

 indistinctly multinucleate, 35-50 x | //. 



On the under side of leaves of Sassafras, Ohio (Kellerman), and 

 New Jersey. 



Species imperfectly known. 



G. prnina, (Schw.) 



Sphesria pruina, Schw. Syn. N. Am. 177O, 

 Gnomonia pruina, Cke. Syn. 3909. 



Scattered, very minute, at first immersed, finally emergent, very 

 black, globose, elongated into a subsetaceous, black, deciduous osti' 

 olum. Covered at fii-st. as well as the leaf, with a white pruinosity. 



On the under side of leaves of Vitis asstivalis, Bethlehem, Pa. 



