591 



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

 aphyses, polysporous, p. sp. 11 2-120 x 10-12 JUL. Sporidia conglobate, 

 allantoid, yellowish, 6-7 x H ft. 



On Comus, New York State (Peck). 



D. Rhois, (Schw.) 



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



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

 mm. diarn., subconfluent or densely gregarious, more or less covered 

 bv the fibers of the wood. Perithecia few in a stroma. Ostiola 



i/ 



conical, subprominent Sporidia numerous, hyaline, slightly curved, 

 5 x 1 //. 



On dead stems of Rhus radicans, Carolina and Pennsylvania 



</ 



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

 In the specc. in Herl). Schw. no asci could be found. 



D. ribesia, (Schw.) 



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



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

 very rough above from the abundant, prominent ostiola, which are 

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

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

 Attached to the wood, and erumpent through the epidermis in strip? 

 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 p.. Sporidia 

 allantoid. hyaline, slender, 5-7 x 1-1 \ it. This is different from Valsa 

 ribesia Karst (see p. 466). 



D. Cephalanthi, (Schw.) 



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

 Diatrypella Cephalanthi, Sacc. Syll. 769. 

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



Stroinata scattered, 2-3 mm. cliam., scarcely penetrating to the 

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

 traversed by a single, longitudinal, deep furrow, giving the appearance 

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

 stroma protrudes itself still further, assuming an orbicular or elliptical 

 form, 1-3 mm. cliam. and roughened by the protruding, black, rough, 

 subconical ostiola which are often 3-4-stellate-cleft. Perithecia 6-20 

 in a stroma, closely packed, ovate or subangular, about J mm. diam.. 

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



