268 



often slightly narrowed above, 35-40 u long. Sporidia crowded, 

 oblong-ovate, nniseptate, colorless, 10-12 x 4-5 [i, divided by the sep- 

 tum into two very unequal parts, the smaller part \-\ the length of 

 the larger. 



On fallen leaves of Fraxinus Americana, Helderberg ilts., 

 New York. 



Whether this is really specifically distinct from S. effigurata, 

 Schw., is donbtful, but we have no authentic specc. of this latter 

 species. Specimens of >S. fraxlnea, Pk., in our Herb, certainly agree 

 well with Schweinitz' description of his S. effigurata. 



S. eiflgurata, (Sehw.) 



Sphisyia effigurata, Sch-w. S3-11. N. Am. 1790. 

 Sphtzrella effigurata, Ckt. Journ. Bot. 1883. 



Spots widely effused, dark cinereous, determinate, often occupy- 

 ing the entire lower surface of the leaf, and appearing as if bounded 

 by a black line, on account of the perithecia being more crowded 

 around the margin. Perithecia very numerous, minute, crowded on 

 the spots, subinnate, subconvex, black, much crowded, so as to form, 

 as it were, a black, cinereous crust. Asci clavate. Sporidia elliptical, 

 uuiseptate, scarcely consti-icted, hyaline, 1 5 x 4 /i. 



On leaves of Fraxinus acuminata, Bethlehem, Pa. See. Schw. 

 not found on any other species of ash. 



S. fraxinicola, (Schw.) 



Sphieria fraxicola, Schw. Syn. N. Am. 1787. 

 SpheErella fraxinicola, Cooke Journ, Bot. 1883. p. 107, 



Hypopliyllous. Perithecia suViinnate, black, at length rimose- 

 (lehiscent, subconnate, forming small, black, subconfluent patches. 

 Asci clavate, short. Sporidia irregularly arranged, subelliptical, uni- 

 .septate, hyaline, lower cell narrower 7|x3 ji. 



On ash leaves, Pennsylvania (Schweinitz), Georgia (Ravenel). 

 Often sterile. 



<S. i^/'«a;m?;, Messl, has the same external appearance as this: 

 the .■^jjoridia, however, are given as 26-28x4 ;i, but in the specc. in 

 Linhart's Fungi Hungarici, 162, and Rab-Winter F. Eur. 3255, they 

 are 20-22 x 3 /.(, and specc. from France (F. Fautrey) have sporidia 

 only 1.5-17 x2i-4 /.«. The asci in all these are 40-60 x 7-9 /i, with 

 the sporidia crowded-biseriate. S. fraxinicola, (Schw.), (sec. Cke.) 

 has sporidia only 7 J x 3 /i, and if so, the two can hardly be the same 

 species. 



S. Asiminfe, E. & K. (in Herb.) 



Perithecia on pale yellowish-white spots 1 cm. diam., scattered. 



