591 



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

 aphyses, polysporous, p. sp. 112-120 s. 10-12 fx. Sporidia conglobate, 

 allantoid, yellowish, 6-7 x 1^ //. 



On Cornus, New York State (Peck). 



D. Rhois, (Schw.) 



' Spkcsria Rhois, Schw. Syn. Car. No. 62. 



Stroma wart-like, obovate, rugose, black (cinereous within), l|-3 

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

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

 conical, subpromment. Sporidia numerous, hyaline, slightly curved, 

 5x1 fi. 



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.) 



Sphcsria 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, hysteriiform opening. Peri- 

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

 Attached to the wood, and erumpent through the epidermis in strij)? 

 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 /«. Sporidia 

 allantoid, hyaline, slender, 5-7 x 1-1 J [x. This is different from Valsa 

 ribesia Karst (see p. 466). 



D. Cephalanthi, (Schw.) 



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

 Diatrypella Cephalanthi, Sacc. Syll. 769. 

 Exsicc. Ell. N. A. F. 777. 



Stromata scattered, 2^ mm. diam., 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 Rysterium, 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. diam. and roughened by the protruding, black, rough, 

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

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

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



