532 



destroyed the succeeding year by the inexorable pest. The imported 

 trees seem to be more injuriously affected than the native species. 



Cr. leptasca, (C. & P.) 



Valsa leptasca, C. & P. 29th Rep. N. Y. State Mus. p. 59. 



Cryptosporella leptasca, Sacc. Syll. 181 1. 



Valsa {Cryptosporella) leptasca, Cke. Syn. 1931. 



Subpustulate, blackish, erumpent. Perithecia small, numerous, 

 tapering above into the papillate or subcorneal ostiola. Asci elon- 

 gated, cylindrical, slender. Sporidia uniseriate, continuous, oblong or 

 elliptic-oblong, usually binucleate, colorless, 7 J fi long. 



On dead branches of Rhus typhina, Buffalo, N. Y. (Peck). 



Sometimes the pustules are confluent or effused. 



Cr. farinosa, (Ell.) 



Valsa farinosa, EH. Bull. Torr. Bot. Club, IX, p. 99. 

 Cryptosporella farinosa, Sacc. Syll. 6024. 

 Exsicc. EH. & Evrht. N. A. F. 2d Ser. 1572. 



Stroma cortical. Perithecia few (2-4), pale, 250-300 p. diam., 

 raising the bark into little protuberances which indicate their position. 

 Disk tuberculiform, yellowish- white, of a loose granular or mealy con- 

 sistence. Ostiola large, pale horn-color, ovate or conical, at length 

 disappearing and leaving a large opening. Asci clavate-cylindrical, 

 obtuse, p. sp. 100-110x15-20 //, with filiform paraphyses, narrowed 

 below into a stipe-like base. Sporidia 1-2-seriate, narrow-elliptical 

 and subacute, subhyaline, with a large, central nucleus, 18-22 x 10 p.. 

 Pycnidia (Harhnessia caudata, E. & E. Journ. My col. I, p. 92). 



On dead oak shoots, Newfield, N. J., and on dead limbs of Lirio- 

 dendron, Plainfield, N. J. (Meschutt). 



Cr. compta, (Tul.) 



Valsa compta, Tul. Sel. Carp. II, p. 196. 

 Cryptospora compta, Winter Die Pilze II, p. 771. 



Stromata mostly numerous, irregularly scattered, pustuliform, 2-3 

 mm. broad, the small, round disk piercing the epidermis, which is flat- 

 tened or depressed around it. Perithecia 2-6 in a stroma, of medium 

 size, globose, circinating in the unaltered, inner bark, abruptly con- 

 tracted into slender necks. Ostiola small, scarcely or only a little 

 thickened, hardly projecting above the very small, white-pulverulent, 

 then ashy-gray disk. Asci 8-spored, narrow-clavate, oblong or cylin- 

 drical, sessile, 100 x 16 p. Sporidia broad-ovate, or sometimes cylin- 

 drical, straight or slightly curved, hyaline, 16-28 x 8-16 /i. 



