313 



Perithecia densely gregarious, in tolerably large (1-10 mm.), 

 indefinitely limited, dendroid or variously shaped groups or patches, 

 at first buried, finally erumpent, spherical, perforated above, black, 

 90-100 ft diam. Asci clavate, sessile, 8-spored, 60 x 6 ft. Sporidia 

 2-3 -seriate, elongated-fusoid, somewhat pointed at the ends, slightly 

 curved, 3-septate, hyaline, 30-35 x 2-3 ft. 



On fallen oak leaves, Carolina, Ohio, Pennsylvania, New York, 

 N-ew Jersey and New England. 



STIGMATEA, Fr. 



Summa Veg. Scand. p. 421, (Sacc. Syll. If p. 541). 



Perithecia innate-subprominent, glabrous, thin-walled. Ostiolum 

 minute, nucleus rather compact, white. Asci oblong, subsessile, 8- 

 spored, paraphysate or pseudoparaphysate. Sporidia ovoid-ellipsoid, 

 unequally uniseptate, yellowish-hyaline. Foliicolous, minute. 



St. Robertiani, Fr. Summa Veg. Sc. p. 421. (Plate 27) 



Dothidea Robertiani, Fr. S. M. II, p. 564. 



Cryptosphczria nilida, Grev. Fl. Ed. p. 363. 



HormotJieca Geranii, Bon. Abh. p. 149. 

 Exsicc. Fckl. F. Rh. 4iq. Kab. F. E. 963, 2129. Rehm Asc. 246. Thttm. F. Austr. 151. 

 id. M. U. 160 Cke. F. Brit. Ser. I, 133 Ell. & Evrht. N. A. F. 2d Ser. 2362. 

 Krieg. F. Sax. 230. Erikss. F. Scand. 90. M. March. 253. F. Gall. 2085. 



Perithecia scattered, gregarious or collected in loose groups, 

 superficial, sessile, hemispherical, smooth and shining, about 140 ft 

 broad and 50-60 ft high. Asci oblong, sessile, 8-spored, 33-45x11- 

 14 ft, mostly broader below, with scanty paraphyses. Sporidia sub- 

 biseriate, ovate-elliptical, unequally two-celled, upper cell broader, 

 greenish, 12-14 x4j-5 ft. 



On living leaves of Geranium Robertianum, Massachusetts (Stur- 

 gis), Canada (Dearness). 



St. Arundinarise, Cke. Grev. VII, p. 50. 



Epiphyllous, gregarious. Perithecia subglobose or depressed, 

 black, astomous, superficial. Asci clavate. Sporidia fusoid, 4-nucleate. 

 at length triseptate, hyaline, 26-30 x 8-10 ft. 



On Arundinaria, Georgia (Ravenel). 



St. Geranii, Fr. Summa Veg. Scand. p. 421. 



Dothidea Geranii, Fr. S. M. II, p. 558. 



Epiphyllous. Perithecia gregarious on a purplish spot, ovate, 

 minute, black, glabrous. Asci elongated, 8-spored, 40 x 8 ft. Sporidia 

 biseriate, subclavate, didymous, hyaline, 8x4 ft. 

 40 



