592 



walls thick, black, coriaceous, necks short. Asci fusoid, 110-115 

 (p. sp. 75-80) X 8-10 II, polysporous, stipitate, paraphysate. Sporidia 

 allantoid, yellowish-hyaline, not strongly curved, 6-9 x 1| ji. 

 On dead steins of Cephalanthus occidentalism common. 



D. spissa, (Schw.) 



Spha:ria spissa, Schw. Syn. N. Am. 1253. 



Crowded in longitudinal cracks in the wood, fomiing narrow 



strips often half an inch long, acuminate at each end, and becoming 



black, considerably elevated in the middle, surface very rough from 



the prominent perithecia. Stroma scarcely any. Perithecia (J-| mm. 



diam.), immersed in the wood itself. Ostiola prominent, subconical. 



Asci (p. sp.) 45-55 x 10-12 //. Sporidia hyaline, slightly curved, 



5 X 1| //. 



On dry oak Wood, Bethlehem, Pa. (Schw.). (Measurements from 



spec, in Herh. Schw.). 

 D. variol6sa, (Schw.) 



Sphcaria variolosa, Schw. Syn. N. Am. 12J2. 



Stromata pulvinate, erumpent, about 2 mm. diam., flatfish, sub- 

 confluent, closely embraced by and partly covered with fragments of 

 the ruptured epidermis, black, rugose. Ostiola numerous, short, quadri- 

 sulcate. Perithecia obovate or pyiiform, rather large, polj'stichous, 

 immersed in the white substance of the stroma. Asci clavate-cylin- 

 drical, 75-80x12-15 /i, with abundant paraphyses. Sporidia yel- 

 lowish-hyaline, allantoid only slightly curved, with a nucleus in each 

 end, 5-6 X 1;|: ti. 



On young branches of Pofulus Italica, Bethlehem, Pa. 



D. pr6mineiis, (Howe). 



Diatrype prominens, Howe, Bull. Torr. Bot. Club, V, p. 42. 



Stroma wart-like, orbicular or angular, 1-1| mm. diam., erum- 

 pent and closely girt by the ruptured epidermis, subprominent, black 

 outside, whitish within. Perithecia 4-8 in a stroma, subglobose, about 

 \ mm. diam. necks short, with their ostiola obtusely conical, slightly 

 prominent and finally broadly and irregularly perforated. Asci clav- 

 ate-stipitate, 75-80 (p. sp. 55-60) x 10-12 ^, paraphysate, polyspo- 

 rous. Sporidia allantoid, yellowish-hyaline, moderately curved, 6-8 x 

 1-li y^. 



On bark of dead Platanus, New York and California, 

 The diagnosis is from New York specc. from Peck. Diatryjm 

 prominens, Cke. & Hark, is distinct from this, having 8-spored asci. 



