168 



C. Perithecid irith the huxc wink in the matrix, mostly .svVo.xr <it Jl rst. 

 R. priuicola, (B. & C.) 



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

 Roscllinia prinicola. Sacc. Syll. 959. 



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

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

 scriate, oblong, subcymbiform, brown, 12-13 /*. long. 



On 1 tranches of Prinos verticillata, Pennsylvania (Michener). 



R. parasitica, E. & E. Proc. Acatl. 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-papillifonn., 

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

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

 1>rown, 7-10x45 (i. This is certainly very near R. det onset (Cke.). 

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

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

 smaller sporidia. 



On dead limbs of Symphoricarpus occidentalis, Helena, Montana 

 (Kelsey). 



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



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

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

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

 5 // (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 subrnembranaeeous. Asci 

 cylindrical, about 100x10 //. 



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. Fitch (com. F. W. Anderson). 



