1893.] NATURAL SCIENCES OF PHILADELPHIA. 447 



in its scattered perithecia and smaller sporidia. On the culm and 

 lower part of the leaves is a Stagonospora (S. Phragmitis E. and E.), 

 which appears to he the stylosporous stage of the Spluerella. The 

 sporules are oblong-elliptical, 2-3-nucleate, yellowish-hyaline, very 

 abundant, 10-12x3-4,", in perithecia about the same as the asci- 

 gerous perithecia. 



Sphaerella Chimaphilae E. & E. 



On living leaves of Chimaphila umbellata, Faulkland, Del. May, 

 1887. (Commons, No. 479). 



Spots amphigenous, 2-3 mm. diam., concave above, orbicular, with 

 a slightly raised border, dark with a lighter center and mostly sur- 

 rounded by a dark colored area of greater or less extent. Perithecia 

 amphigenous, seated on the spots and on the blackened area around 

 them, iuuate with the apex erumpent, 75-100// diam. Asci cylindric- 

 oblong, subsessile, 40-45 x 6-7//. Sporidia subbiseriate, oblong- 

 fusoid, uniseptate, hyaline, not constricted, 7-8x2-2*//. The larger 

 spots are indistinctly zonate. 



Allied to S. Vaccinii Cke. but in that there are no definite spots 

 and the sporidia, as shown by an examination of authentic specc. , 

 are longer (12-15 x l*-2//) or (Sec. Cke. ) 12-18 x 1 \-%,.. 



Physalospora Ambrosiae E. & E. 



On living leaves of Ambrosia trifida, Racine, Wis. Sept. 1893. 

 (Davis, No. 9317). 



Spots irregularly elliptical or sub-orbicular, J-li cm. diam., rusty 

 brown, surrounded by a light yellow aureole. Perithecia ovate, 

 about 200// diam., the perforated apex strongly projecting above and 

 the rounded base equally prominent below. Asci clavate-cylindrical, 

 60-70x10-12//, subsessile, paraphysate, 8-spored. Sporidia uni- 

 seriate below, subbiseriate above, oblong-elliptical, hyaline, continu- 

 ous, 2-nucleate, 10-12x6-7//. 



Leptosphaeria muricata E. & E. 



On leaves of Andropogon muricatus, St. Martinville, La. (Lang- 

 lois). 



Perithecia scattered, lying in the channels between the nerves of 

 the leaf and covered by the epidermis, with the apex and papilliform 

 ostiolum slightly projecting, subelliptieal, 150-250// in the longer 

 diam. Asci slender, sub-cylindrical, 65-70 x 5-6//, paraphysate, 



