52 THE WKST VIRGINIA FLORA 



to 112 |U, diameter. Sporules globose or short-clliplical. hya- 

 line, granular, 6 to 8 x 5 to 6 ;ii. 

 P. Negundinis Sacc. 



On Acer Negmido, July 5, 1894. Sporules 5 to 10 x 3 to 

 7.5 IX {NuttaU, 1631, 560, 561). 



P. ^ sp. 



On Gciirn Canadensc, Oct. 24, 1894 (N^ittall, 1733). 

 Spores irregular 4 to 7.5 x 1.5 to 2.5 /x, 2-nucleate. 

 P. ACERICOLA E. & E. 



On living leaves Acer sacchariiiiiin, Putnam Co., near 



Buffalo, 1891 (MillspaugJi). On leaves A. ruhnim, June 



24, 1894 (Nuttall, 1 561). 



P. Xanthorrhizae E. & Nuttall, Field Mus. Bot., i :io5 (1896). 



Type habitat : On leaves Xanthorrhisa apiifolia, Nov. 



3, 1893 {Nuttall, discov. 1738, 625). 



Spots subelliptical, dirty-white in the center with a dark 

 shaded margin, 3 mm. to i cm. long x 2 to 8 mm. wide, 

 finally more or less deciduous. Perithecia seated on the 

 white part of the spots, epiphyllous, subdiscoid, perforated 

 above, 60 to 75 /x diameter. Sporules oblong-elliptical, hya- 

 line, 2-nucleate, 5 to 6 x 2.5 to 3 ix. 



Accompanied by a Macrosporium on the same spots. 



P. sp. 



On leaves Rnbiis Canadensis, Nov. 3, 1894. Sporules 

 variable in form, 5 x 1.25 to 2 ;u, (Nuttall, 1747, 627). 

 P. cercidicola E. & E., Field Mus. Bot., 1:105 (1896). 



Type habitat: On leaves Cercis Canadensis, Nov. 21, 

 1894 (Nuttall, discov. 1751). 



Spots suborbicular, .5 to i cm. diameter, rusty-brown, be- 

 coming lighter, paler below, margin narrow reddish-purple. 

 Perithecia epiphyllous, convex, suberumpent, but covered 

 (except the apex) by the epidermis, no to 150 /x diameter. 

 Sporules oblong, slightly narrowed and rounded or obtusely 

 pointed at the ends, hyaline, 2 to 3-nucleate, 15 to 20 x 6 

 to 7 /x. _ 



Differs in the character of the spots, and in the presence 

 of a perithecium, from Gloeosporium Cercidis, E. & E. 

 P. Araliae E. & E., Proc. Phila. Acad., 1894, 355. 



Type habitat : On leaves Aralia spinosa, Sept. 20, 1895 

 (Nuttall, discov. 1703, 598 588?). 



Spots suborbicular, light-brown with the margin a little 

 darker, 5 to i cm. diameter. Perithecia epiphyllous. some- 

 what flattened, 100 to 150 /x diameter. Sporules oblong- 

 elliptical, hyaline, 2-nucleate, 10 to 15 x 5 to 6 pi. 

 P. Sassafras Cooke. 



On leaves Sassafras Sassafras, June 28, 1894. Sporules 

 5 to 7 X 2 to 3 /.I (N lit tall, 1566). 



