622 



A. Stroma cup-shaped or concave. 

 N. discreta, (Scliw.) (Plate 39) 



Sphceria discincola, Schw. Syn. Car. No. 63. \ 



Sphceria disci eta, Schw. Syn. N. Am. 1249. 



Sphceria excavata, Schw. 1. c. 1250, (sec. spec, in Herb. Schw.). 

 Nummularia discreta, Tul. Sel. Carp. IT, p. 45. 

 Exsicc. Rav. Fungi Car. II, No. 57. Ell. N. A. F. 489. 



Stroma erumpent, orbicular, 2-4 mm. diam., cup-shaped, with a 

 thick, raised margin, dirty cinereous, then black, the concave surface 

 at first white-punctate from the minute, punctiform ostiola which, in 

 the mature state, are scarcely visible. The wood beneath the stroma 

 is marked with a black, circumscribing line. Perithecia monostichous, 

 ovate-cylindrical, nearly 1 mm. long, rather abruptly contracted above 

 into a short neck, their rounded bases penetrating to the bottom of the 

 stroma. Asci cylindrical, 110-120 x 1012 //, with long, filiform par- 

 aphyses. Sporidia subglobose, nearly hyaline at first, finally opake, 

 10-12 //diam. 



On dead branches and trunks of Pyrus Mains and Amelanchier 

 Canadensis, Newfield, N. J.; on the first-named host, New England 

 (Farlow), New York (Peck); on Gleditschia triacanthos, Ohio (Mor- 

 gan), found also (sec. Sacc. in Syll.) on Sorbus, Ulmus, Cercis, and 

 Magnolia. 



Sec. Cooke Grev. XII, p. 6, the specimen of Sphceria discincola, 

 Schw., in the Kew Herbarium, figured by Currey in Linn. Trans. 

 1858, PL 47, fig. 105, does not differ from S. discreta, Schw. 



N. repanda, (Fr.) 



Sphceria repanda, Fr. S. M. II, p. 346, Obs. Mycol. I, p. 16S, 

 Hypoxylon repandum, Fr. Summa Veg. Sc. p. 383. 

 Nummularia pezizoides, E. & E. Bull. Torr. Bot. Club, XI, p. 74. 

 Nummularia repanda, Nitsch. Pyr. Germ. p. 57. 

 ' Exsicc. Fckl. F. Rh 2178. Thum. M. U. 1460. 



Stroma erumpent-superficial, orbicular, or subelliptical, J-l cm. 

 diam., concave, and often with a thin, erect, rather broad margin, rufo- 

 cinereous at first, finally black ; disk mammillose from the projecting 

 ostiola. Perithecia monostichous, immersed, ovate-oblong, J-} p long, 

 crowded, often subangular from mutual pressure. Asci cylindrical, 

 subsessile, 8-spored, 110-120x8 p, with long, filiform paraphyses. 

 Sporidia obliquely uniseriate, narrow ovate, obtuse, subinequilateral, 

 dark brown/ 11-14x4-5 p (15-16x6-7 p, Sacc. in Syll.). Dis- 

 tinguished from N. discreta by its mammillose disk and differently 

 shaped sporidia. 





