l.T 



A. On woody dicotyledonous plants. 



pulcheila, C. & P. 25th Rep. N. Y. State Mus. p. 106. 



Perithecia minute, hypophyllous, crowded. 15-40 together in 

 small (H-2| mm.), orbicular or subangular patches, and clothed with 

 short, stout, spine-like bristles 20-40x4-5 p. Asci cylindrical, or 

 clavate-cylindrical, 60x7 /jl, with imperfectly developed paraph 

 Sporidia uniseriate, uniseptate, yellowish, 7-9 x 3 /i. 



On living leaves of Cassandra calyculata, New Jersey to ( Sanada. 



V. orbieula, (Schw.) 



Sphceria orbieula, Schw. Syn. N. Am. No. 1789. 

 Venturia orbieula, C. & P. 25th Rep. N. Y. State Mus. p. 105. 

 Exsicc. Thum. M. U. 855 Rab. Winter F. E. 3143 Rav. Car. IV, 64 Ell. N. A. F. 700. 

 EU. & Evrht. N. A. F. 1687. 



Perithecia minute, globose, superficial, clothed with black, per- 

 sistent, spreading hairs, collected in orbicular groups 3-G mm. diam. 



The perithecia are often more crowded around the margin of the groups, 

 so as to form a narrow, black circumscribing line. Asci short, sub- 

 clavate. Sporidia oblong, uniseptate, the cells often unequal, 10 x 2- 

 2^ /i. Often sterile. 



On leaves of various species of oak, New Jersey and New York, 

 west to Kansas. 



A Yar. occurs on fallen leaves of Quercus coccinea, with the peri- 

 thecia irregularly scattered (var. sparsa E. & E.) 



V. ditricha, (Fr.) 



Sphcsria ditricha, Fr. S. M. II, p. 515. 

 Vermicularia ditricha, Fr. Summa. Veg. Sc. p. 420. 

 Venturia maculans, Pk. 28th Rep. p. 81, id. 30th Rep. p. 77- 

 Venturia ditricha, Karst. Myc. Fenn. II, p. 188. 

 Sphceria ditricha, Fckl. Symb. p. 100. 

 Exsiec, Fckl. F. Rh. 568. Rehm Asc. 597, 79 2 Thum. F. Austr. 247. id M 

 Krgr. F. Sax. 232. Sydow. M. March. 982. 



Perithecia very small, emergent, mostly hypophyllous, subgre* 

 garions, seated on gray, indeterminate, confluent spots. depr< 

 shpseroid, black, with a papilliform ostiolum and a few (4-10). spread- 

 ing, continuous, black, bristle-like hairs. Asci with a very short stipe, 

 oblong-cylindrical, 35-45x10-12 ,u, S-spored, with obscure paraph 

 Sporidia biseriate, ovate-oblong, uniseptate, greenish-hyaline, 12-1 6i 

 5-6 p, lower cell narrower. 



On fallen birch leaves, New York (Peck). 

 18 



