517 

 Cr. eutypseWrmis, Sacc. Syll. 5907, Mich. II, p. 569. 



Diatrype guercina, {Pers.J var. lignicola, C. & K. Grev. V, p, 54. 



Perithecia gregarious, immersed in the blackened surface of the 

 wood, subglobose, J-f mm. diam., black. Ostiola scarcely emergent, 

 depressed -conical, smooth, finally perforated. Asci subfusoid, grad- 

 ually narrowed below into a stipe about 50 n long, subtruncate above, 

 p. sp. 70-80x9-10 fi, polysporous. Sporidia irregularly crowded, 

 allantoid, moderately curved, 5-7 x IJ fi, olivaceous. 



On weather-beaten wood of maple, Newfield, N. J. 



Distinguished from Cr. Citriand Cr. elevata, by its much smaller 

 sporidia. The perithecia are mostly in dense clusters, and raise the 

 blackened surface of the wood into little pustules more or less conflu- 

 ent, and vai'ying from subhemispherical or elliptic-elongated, wart-like 

 protuberances, with the sides abrupt, to mere convex swellings. 



VALSELLA, Fckl. 



Symb. p. 203. 



Stroma valsoid, cortical, generally limited by a black, cii-cum- 

 scribing line. Ostiola entire (not sulcate). Disk generally pale. Asci 

 sessile, polysporous. Sporidia allantoid, hyaline. Spermogonia, when 

 present, cytisporoid. 



V. melastoma, (Fr.) 



Spharia melastoma, Fr. S. M. II, p. 388. 

 Valsella melastoma, Sacc. Syll. 617. 



Stroma conical, attenuated, more or less protuberant, about 1 mm. 

 diam., attached to the epidermis, disk orbicular or subelliptical, minute, 

 at first whitish-cinereous, becoming brown. Perithecia 2-6, subcii'ci- 

 nate, subsphseroid, rather large, necks short, slender. Ostiola minute, 

 rounded, black, crowded, rarely scattered. Asci clavate-cylindrical, 

 30-50 X 6 /i. Sporidia conglobate, allantoid, slightly curved or nearly 

 straight, 4-7 x 1 /i. 



On limbs of apple trees, Pennsylvania (Schw.), Syn. N. Am. 1341. 



V. Laschii,'(Nits.) 



Valsa Laschii, Nits. Pyr. Germ. p. 235. 



Stromata, minute orbicular at base, conical or depressed-conical, 

 closely covered, except the small, punctiform, orbicular, dirty-white 

 disk, by the thin, translucent epidermis. Perithecia 2-4 in a stroma, 

 subcircinate, very small, globose or depressed. Ostiola only visible 

 with a lens, collected in the center of the minute disk, scarcely promi- 

 nent rounded and shining. Asci cylindric-clavate, sessile, polysporous, 



