137 



A. On v<oody dicotyledonous plants. 

 V. pulehella, (\ & P. 25th Rep. N. Y. State Mus. p. 106. 



Perithecia minute, hypophyllous. crowded. 15-^0 together in 

 small (1|-2| mm.), orbicular or subangular patches, and clothed with 

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

 clavate-cylindrical, 60 x 7 /JL. with imperfectly developed paraphyse<. 

 Sporidia uniseriate. uniseptate. yellowish. 7-9x3 //.. 



On living leaves of Cassandra calyculata, New Jersey to Canada. 

 V. orhicula, (Schw.) 



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

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



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

 Ell. & Evrht. X. A. F. 1687. 



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

 sistent, spreading hairs, collected in orbicular groups 3-6 mm. diarn. 

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

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

 da vate. Sporidia oblong, uuiseptate, the cells often unequal, 10x2- 

 2J //. 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.) 



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

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

 Vent in ia maculans, Pk. 28th Rep. p. Si, id. 3oth Rep. p. 77. 

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

 Sphceria ditricha, Fckl. Symb. p. 100. 



Exsicc, Fckl. F. Rh. 568. Rehm Asc. 597, 792. Thurn. F. Austr. 247. id. M. U 350. 

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



Perithecia very small, emergent, mostly hypophyllous, subgre- 

 garious, seated on gray, indeterminate, confluent spots, depressed- 

 shpaeroid. 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 ,, 8-spored, with obscure paraphyses. 

 Sporidk biseriate, ovate-oblong, uniseptate, greenish-hyaline, 12-16x 

 5-6 fjt, lower cell narrower. 



On fallen birch leaves. New York (Peck). 

 18 



