591 



short neck. Asci subcylindrical, with a long stipe and filiform par- 

 aphyses, polysporous, p. sp. 112-120 x 10-12 /i. Sporidia conglobate, 



allantoid, yellowish, 6-7 x 1 fi. 



On Cornus, New York State (Peck). 



D. Rhois, (Schw.) 



Sphcsria Rhois, Schw. Syn. Car. No. 62. 



Stroma wart-like, obovate, rugose, black (cinereous within), 1J-3 

 mm. diam., subconfluent or densely gregarious, more or less cover. -.1 

 by the fibers of the wood. Perithelia few in a stroma. Ostiola 

 conical, subprominent. Sporidia numerous, hyaline, slightly curve. I, 



5 x 1 JUL. 



On dead stems of Rhus radicans, Carolina and Pennsylvania 



(Schw.), and on Rhus diversiloba, California (Harkness). 

 In the specc. in Herb. Schw. no asci could be found. 



D. ribesia, (Schw.) 



Sphceria ribesia, Schw. Syn. N. Am. 1257. 



Effused, consisting of many small, aggregated, confluent pulvinuli; 

 very rough above from the abundant, prominent ostiola, which 

 thick, short, irregular, with an elongated, hysteriiform opening. Peri- 

 thecia rather large, mostly obovate, in a scanty, whitish stroma. 

 Attached to the wood, and erumpent through the epidermis in Btripe 

 reaching as much as 24 mm. long, by 6 mm. wide. 



On dead stems of Ribes rubrum, Bethlehem, Pa. (Schw.). 



Specc in Herb. Schw. have asci (p. sp.) 40-50 x 10 a. Sporidia 

 allantoid, hyaline, slender, 5-7 x 1-1 J fi. This is different from VaJLsa 

 ribesia Karst (see p. 466). 



D. Cephalanthi, (Schw.) 



Sphceria Cephalanthi, Schw. Syn. Car. No. 59. 

 Diatrypella Cephalanthi, Sacc. Syll. 769. 

 Exsicc. EH. N, A. F. 777. 



Stromata scattered, 2-3 mm. diam., scarcely penetrating to the 

 wood, at first small and subtubercular-erumpent, black, apex generally 

 traversed by a single, longitudinal, dee}> furrow, giving the appearance 

 of a Hysterium, but this furrow is soon obliterated as the apex of the 

 stroma protrudes itself still farther, assuming an orbicular or elliptical 

 form, 1-3 mm. diam. and roughened by the protruding, Mark, rough, 

 subcorneal ostiola which are often 3-4-stelIate-cleft Perith 

 in a stroma, closely packed, ovate or Bubangnlar, about \ mm. diam.. 

 lying in and covered by the scanty, whitish Bubstance of the stroma: 



