536 



Stromata scattered, orbicular, convex, 2-3 mm. diam., formed of 

 the unaltered substance of the bark, which is scarcely or only slightly 

 discolored and not circumscribed by any black line. Perithecia gen- 

 erally 5-12, subcircinate, globose, necks converging, with their short- 

 cylindrical, subcorneal, white-pulverulent ostiola erumpent through a 

 whitish disk which is soon obliterated. Asci (p. sp.) 56-60x6-7 p, 

 apai^physate, 8-spored. Sporidia biseriate, fusoid, 4-nucleate, becom- 

 ing uniseptate or indistinctly 3-septate, 12-15 x 3 //, with a slight hair- 

 like appendage at each end, readily seen in the young sporidium, but 

 finally absorbed. 



On dead Rhus copallina and R. typhina, common. 



We have seen no authentic specc. of V. albovelata, B. & C, but 

 the diagnosis of that -species does not enable one to separate it from 

 the Sphceria aculeans, Schw., and (sec. Farlow) the specc. of V. albo- 

 velata, B. & C. in Herb. Curtis, are the same as Sphceria aculeans, 

 Schw. Valsa Rhois, Cke., is certainly the same as shown by the 

 specc. in Cooke r s exsiccati cited. The two additional septa sometimes 

 seen, are only pseudosepta, being only the dividing line between two 

 adjacent nuclei. 



Cr. Pennsylvania, (B. & C.) 



Valsa Pennsylvanica, B. & C. Grev. IV, p. ioo. 

 Diaporthe cylin'drospora, Pk. 38th Rep. p. 104. 

 Valsa prunicola, Pk. 33rd Rep. p. 34. 

 Calospora Pennsylvanica, Sacc. Syll. 3700. 

 Valsa {Calospora) Pennsylvanica, Cke. Syti. 2043, 



Pustules valsoid, somewhat prominent, erumpent, scattered. Peri- 

 thecia numerous, 15-30 or more, crowded, covered by the thin, black- 

 ened surface of the inner bark, the ostiola rather long, stout, cylin- 

 drical, rounded at the tips, crowded, exserted. Asci narrow, subfusi- 

 ,form, 35-50x5-7 p.. Sporidia subcylindrical, crowded or biseriate, 

 4-nucleate, hyaline, 13-19 x 3-4 p. (25 /i long, Berk.). 



On dead branches of Primus Pennsylvanica, Adirondack Mts. T 

 N. Y., and on P. Americana, Iowa. 



The original description of this species in Grevillea is as follows : 

 " Bursting transversely. Perithecia in the center of a facette. Spo- 

 ridia narrow, oblong, sometimes wide at one end, sometimes slightly 

 curved, triseptate. 25 ;i long. On Cerasus Pennsylvanica, mountains 

 of New York (Berk. 1. c.)." 



Cr. Carya*, Pk. 38th Rep. p. 106, tab. 2, figs. 28-31. 



Pustules scattered, covered by the epidermis, then erumpent, cir- 

 cumscribed by a black line or at length covered by a black crust 

 beneath the epidermis. Perithecia 4-12 in a pustule, globose or 



