476 



This species (sec. Peck) was found on dead alders, near Buffalo-.. 

 N. Y. 



We have seen no specc, and translate the diagnosis from Fries 71 

 Sy sterna. 



*** Macrosporce. Spwidia more than 12 p, long. 

 V. ambiens, (Pers.) 



Sphceria ambiens, Pers. Syrr. p. 44. 



Sphczria deplanata, Nees, in Fr. Summa Veg. Sc. p. 394. 



Sphceria capsularis, Pers. Syn. p. 42. 



Sphceria sphtnctrina, Fr. (pr. p.) S. M. II, p. 400. 



Valsa corticis, Tul. in Ann. Sci. Nat. Ser. IV, torn. V, p. 117. 



Sphceria tetraspora, Curr. Linn. XXII, p. 279,. fig. 148-. 



Valsa ambiens, Fr. Summa, p. 412. 



Valsa conscripta, C. & E.'Grev. VII, p. 80. 



( Valsa cooperla, Cke. Valsei of the U. S. p. ir8) ? 



Exsicc. Fckl. F. Rh. 616, 2141. Kze. F. Sel. 149, Rab. F. E. 1131, 153^. Rehm Asc. 48,. 



171, 223. Sydow. M. March. 33, 465, 663. Krgr. F. Sax. 172, 431. Roum. F. G. 



1 178, 4447 Cke. F. Brit. 2d Ser. 232. Plowr. Sph. Brit. 46. Sacc. M. Ven. 1493. 



EH. N. A. F. 868. 



Stromata numerous and generally thickly scattered, surrounding 



and extending for some distance along the limbs, orbicular or ellip- 

 tical at base, and 1 f-3 mm. broad, obtusely conical above and, for the 

 most part, distinctly pustulate-prominent, covered by the closely 

 adherent epidermis, which is pierced by the erumpent disk or stel- 

 lately cleft with the laciniae adhering. Perithecia 4-20 (mostly 6-10)/ 

 subcircinate in the unaltered substance of the inner bark, about J mm. 

 diam., and mostly not crowded, necks slender ^ decumbent, with their 

 large, depressed-spherical, black ostiola erumpent around the margin 

 of the small, whitish disk or irregularly arranged, crowded and obliter- 

 ating the disk. Sometimes the epidermis is slightly depressed just 

 around the disk T with a circle of slight protuberances indicating the 

 position of the subjacent perithecia. Asci (p. sp.) 40-55 x 12-15 //, 

 4-8-spored, with a slender, stipe-like base 30-35 /i long. Sporidia 

 conglomerate or subbiseriate, allantoid, hyaline, slightly curved, 

 obtuse, 14-24 x 3-5 p. in the 8-spored asci, in the 4-spored asci, 24-36 

 x 5-8 p. 



On dead limbs of various deciduous trees, common, at least 

 throughout the northern U. S. and Canada. 



We have specc. from Canada on ash, hawthorn, elm, oak, bass- 

 wood and hickory; from Iowa, on Pyrus coronaria; from Montana, 

 on Shepherdia Canadensis ; from New York, on Acer vubrum; from 

 Nebraska, on Sambucus; from New Jersey, on JVyssa, Liquidambar 

 and Pyrus, and the tetrasporous form on Morns, from Illinois. 



