137 

 A. On woody dicotyledonovs plants. 

 V. pnlch^Ua, €. & P. 25tli Rep. N. Y. State Mus. p. 106. 



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

 small (l2-2| mm.), orbicular or subangular patches, and clothed with' 

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

 clavate-cylindrical, 60 x 7 pi, with imperfectly developed paraphyses. 

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



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



V. orbicula, (Scliw.) 



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

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

 Exsicc. Thum. M. U. 855.— Rab. Wiuter F. B. 3143.— Rav. Car. IV, 64.— Ell. N. A. F. 700. 

 Ell. & Evrht. N. A. F. 1687. 



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

 sistent, spreading hairs, collected in orbicular groups 3-6 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^ [1. Often sterile. 



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

 west to Kansas. ' 



A Var. occurs on fallen leaves of Quercus cocciiiea, with the peri- 

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



V. ditricha, (Fr.) 



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

 Vernticularia ditricha, Fr. Surama. Veg. Sc. p. 420. 

 Venturia maculans, Pk. 28th Rep. p. 81, id. 3otli Rep. p. 77. 

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

 Sphmria ditricha, Fckl. Symb. p. 100. 

 Exsicc, Fckl. F. Rh. 568.— Rehm Asc. 597, 792.— Thum. P. 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- 

 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, 35^5x 10-12 //, 8-spored, with obscure paraphyses. 

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

 5-6 fx, lower cell narrower. 



On fallen birch leaves. New York (Peck). 

 18 



