727 



surrounding it like a broad, convex, thick ring blackened and rough- 

 ened by the broken stromatic crust and the abundant perithecia. 

 Often a limb 6-10 ft. long will have half a dozen or more of these 

 swellings scattered along at intervals and varying in size from 2-8 

 inches in diameter. Sometimes they appear on the trunk of a tree, 

 forming swellings 6-12 inches thick, or even larger, when, as often 

 happens, they surround the trunk. We have never found ascigerous 

 specimens of this or of D. faginea. 



D. csespitosa, Schw. Syn. N. Am. 1828. 



Perithecia cespitose-erumpent through an innate veil, generally 

 four together, rounded-subcompr-essed, sooty-black, at length brownish- 

 pulverulent, sometimes regularly elongated at the apex, or dehiscing 

 by a short cleft. Perithecia surrounded by the subcinereous, rup- 

 tured epidermis, black, elevated and collected in groups of considerable 

 extent. 



On beech bark. New England (Torrey). 



The diagnosis is from Schw. Synopsis, and is all we know of this 

 species. 



