326 



B. Sporidia uniseptate (lUugnomonia)* 

 (h setacea, (Pers.) 



(Plate 32) 



Sphceria setacea, Pers. in Usteri, Ann. d. Bot. St, n, p. 25, taf. 2, fig. 7 a. 

 Gnomonia setacea, Ces. & De Not. Schema, p. 58. 

 Gnomonia nervisequia, Fckl. Symb. p. 122. (sec. Winter). 



Sphceria ischnostyla, Desm. Ann. Sci. Nat. Ill, Ser. torn. XI, p. 375 (sec. Awd.) 

 Exsicc. Fckl. F. Rh, 871, 878. Kze. F. Sel. 113, 251. Rehm Asc. 494, 495. Rab. F. E. 

 1450? 2756. Thum. M. U. 455, 1 741. Ell. & Evrht. N. A. F. 2d Ser. 2138. 



Perithecia mostly hypophyllous, scattered, covered, globose, black, 

 200-300 ft diam., with a very long, slender, thread-like ostiolum gen- 

 erally curved and twice as long as the diameter of the perithecium. 

 Asci oblong-clavate or fusoid, contracted below into a short stipe, 

 4-8-spored, 30-40x6-9 fi. Sporidia fasciculate-crowded, fusoid or 

 rod-shaped, subacute at the ends and often with a bristle-like append- 

 age, straight or slightly curved, septate in the middle, but not con- 

 stricted, hyaline, 12-16 xl|-2 fi. 



On fallen leaves of Quercus, Castanea and many other trees, 

 common. 



Specc. on fallen leaves of Carya, found at Newfield, N J., have 

 the sporidia 20-25 ju long, but do not differ otherwise from the usual 

 form. 



G. Myricse, C. & E. Grev. VI, p. 17. 



Exsicc. EH. & Evrht. N. A. F. 2137. 



Perithecia hypophyllous, gregarious, small, only the rostrate osti- 

 olum piercing the cuticle. Asci clavate, 25-30 x 6-7 ju, 8-spored. 

 Sporidia mostly biseriate, narrow-elliptical, hyaline, 4-nucleate, becom- 

 ing unequally uniseptate, 6-8 x 2J 3 /i (10 p. long, Cke.) 



On red-brown spots on living leaves of Myrica eerifera, or on 

 fallen leaves without spots, Newfield, N. J. 



G. Alni, Plowr. Grev. VII, p. 74. 



Exsicc. EH. & Evrht. N. A. F. 2d Ser. 2360. 



Perithecia minute, in clusters, buried in the substance of the leaf, 

 Ostiola elongated, slightly tapering at the apex. Asci ovate-elongated r 

 35-40 x 10-15 fi. Sporidia 8, hyaline, curved, uniseptate. nucleate, 

 22-25 x 3-4 p.. 



On living leaves of Alnus, California. 



The bases of the perithecia project slightly on the opposite side of 

 the leaf, raising the -surface into minute tubercles. 



G. clavulata, Ell. Am. Nat. March. 1883, p. 318. 



Exsicc. EH. & Evrht. N. A. F. 2d Ser. 1685, 



