1894.] NATURAI. SCIENCES OF PHILADELPHIA. 357 



130), but in that species the spots are larger, perithecia more 

 prominent below, and sporules rather larger. Ph. marginalis E. & 

 E. also has similar sporules but the perithecia are hypophyllous. 

 Phyllosticta Castaneae E. & E. 



On leaves of Castanea vesca, near Nuttallburg, West Va., July, 

 1894 (L. W. Nuttall, No. 570). 



Spots orbicular, rust coloi*, with narrow, dark-shaded margin. 

 Perithecia epiphyllous, scattered on the spots, dark, semierumpent, 

 100" diam., often collapsing. Sporules oblong, hyaline, 5-7x2- 



Phoma negundinioola Thum., var. ramicola E. & E. 



On dead limbs of Negundo aceroides, Nuttallburg, West Va., 

 Apr. 1894 (L. W. Nuttall, No. 466), Delaware (Commons). 



Perithecia evenly, but not thickly scattered, globose, small, J-J 

 mm. diam., covered by the slightly ruptured epidermis, but dis- 

 tinctly prominent. Sporules oblong-elliptical, or ovate, hyaline, 

 with a single large nucleus, 10-13 x 4-52/'. 



Differs from the typical form on the dead peduncles, in its broader 

 (2J-3,'/) sporules. 



Phoma Pennsylvauica E. & E. 



On dead limbs of Acer Pennsylvanicum, Nuttallburg, West Va., 

 Feb. 1894 (Nuttall, No. 318). 



Perithecia numerous, evenly scattered, subepidermal, i-| mm. 

 diam., whitish inside, raising the epidermis into minute pustules, but 

 8carceh' rupturing it. Sporules subglobose, 6-71//. diam., nearly 

 hvaliue. 

 Phoma pedunculi E. & E. 



Ou old peduncles of MarpioUa Fraseri, Nuttallburg, West Va., 

 Jan. 1894 (L. W. Nuttall, No. 297). 



Perithecia scattered, flattish pustuliform, i-| mm. diam., with a 

 prominent, papilliform ostiolum. Sporules fusoid-oblong, hyaline, 2- 

 3-nucleate, 7-11 x 2-2^//, ends acute. 



Differs from Stagonospora peduncAili E. & E. in its larger, flatter 

 perithecia and fusoid-oblong (not* cylindrical), rather shorter sporules. 



Phoma ohscurans E. & E. 



Ou leaves of Fragaria (cult.), Nuttallburg, West Va., and New- 

 field, N. J. 



Spots 5-8 mm. diam. , with a ferruginous center and broad purple 



