168 



C. Perithecia with the base sunk in the matrix, mostly setose at first. 

 R. prinicola, (B. & C.) 



Sphceria prinicola, B. & C. Grev. IV, p. 142. 

 Rosellinia prinicola. Sacc. Syll. 959. 



Perithecia erumpent, rather large, subglobose, very minutely gran- 

 ulated, very obtuse, pierced at the apex. Asci linear. Sporidia uni- 

 seriate, oblong, subcymbiform, brown, 12-13 /i long. 



On branches of Prinos verticillata, Pennsylvania (Michener). 



R. parasitica, E. & E. Proc. Acad. Nat. Sci. Phila. Pa. July, 1890. 



Perithecia gregarious, seated on the wood in transverse cracks of 

 the bark or often, on or among the collapsed perithecia of a sterile 

 Valsa on the same limbs, ovate-globose, covered with short, black, 

 spreading bristles at first, but these soon disappear, leaving the perithe- 

 cia rough, J-J mm. diam., smoother above, with a broad-papillifbrm, 

 obtuse ostiolum. Asci cylindrical, 60-70 x 6 fi (p. sp.), with abundant 

 paraphyses. Sporidia uniseriate, oblong-elliptical, subobtuse, dark 

 brown, 7-10 x 45 ft. This is certainly very near P. detonsa (Cke.), 

 which Sacc. in Sylloge considers a var. of P. ligniaria (Grev.) ; but it 

 differs in its perithecia more flattened above, and in its constantly 

 smaller sporidia. 



On dead limbs of Symphoricarpus occidentalism Helena, Montana 

 (Kelsey). 



R. Kellermanni, E. &E. Proc. Acad. Nat. Sci. Phil., July, 1890. 



Perithecia gregarious, superficial, subglobose, about 200 /x diam., 

 clothed, except the papilliform ostiolum, with short (15-22 /x), straight, 

 spreading bristles, but finally, nearly bare. Asci cylindrical, 35-40 x 

 5 tx (p. sp.), 8-spored. Sporidia uniseriate, brown, elliptical or sub- 

 globose, 4-6x3-4 /*. Distinguished by its small sporidia. 



On rotten wood of Negundo aceroides, Manhattan, Kansas. 



R. albolanata, E. & E. Proc. Acad. Nat. Sci. Phil., Pa., July, 1890. 



Perithecia subseriate, erumpent, the lower part remaining sunk 

 in the wood, about 1 mm. diam., clothed, except the black, papilliform 

 ostiolum, with a thin, white, farinose coating which finally disappears, 

 bicorticate, outer wall carbonaceous, inner submembranaceous. Asci 

 cylindrical, about 100x10 fx. 



On old rails, Emma, Mo. (Demetrio). Found also bursting through 

 the bark on dead Salix limbs, at Mill Creek, near Sheridan, Montana, 

 by Mr. and Mrs. H. M. Pitch (com. F. W. Anderson). 



