446 



D. Peckii, Sacc. Syll. IX, p. 713. 



Diapovthe sparsa, Pk. 39th Rep. p 52. 



Perithecia few, minute, scattered, immersed in the wood, which 

 is blackened on the surface. Asci clavate or subcylindrical, 75-87 x 

 7 J 10 //. Sporidia crowded, oblong or subfusoid, hyaline, uniseptate 

 and constricted at the septum, 4-nucIeate, 20-27 x 5-8 //. 



On dead branches of Rhus Toxicodendron, New York. 



D. Megalospora, E. & E. Proc. Acad. Nat. Sci. Phil. July, 1890, 

 p. 235. 



Perithecia globose, |-| mm. diam., scattered, buried in the wood, 

 which is blackened on the surface but remains white within, abruptly 

 contracted above, and prolonged into a long (2-3 mm.), rough, sub- 

 tlexuous ostiolum. Asci (p. sp.) 70-90 x 10-12 jx. Sporidia biseriate. 

 oblong-fusoid, slightly curved, uniseptate and constricted at the sep- 

 tum, each cell with 1 or 2 large nuclei, acute at the ends, 25-35 x 

 4-5| fi. Narrower than in D. leucosarca. 



On dead wood of Sambucus Canadensis, Manchester, Mass. 

 (W. C. Sturgis). 



D. gorgonoidea, Cke. & Hark. Grew XIII, p. 18. 



Stroma effused, covered by the easily separable bark, blackening 

 the surface of the wood, or forming an interrupted crust, limited within 

 by a black line. Perithecia globose, immersed in the wood, mostly 

 much crowded. Ostiola cylindrical, slender, flexuous, much elongated. 

 Asci cylindric-clavate, 8-spored. Sporidia biseriate, fusiform, straight, 

 4-nucleate, at length 2-celled, hyaline, 15-17 x 3 ju. 



On Australian Acacia, California. 



Closely allied to D. medusma and D . fascicidata. 



D. cryptica, Nitschke, Pyr. Germ. p. .265. 



Exsicc. Sydow, M. March. 2239. 



Stroma variously effused, covered by the unaltered bark, and 

 when this is removed, the surface of the wood is seen to be marked 

 and spotted with variously shaped areas bounded by a black line 

 which penetrates the wood. Perithecia scattered, or here and there in 

 small groups or clusters of 2-4 together, sunk more or less deeply 

 into the wood, globose or angular from mutual pressure, J-| mm. 

 diam. Ostiola thick, nodulose or ventricose, more or less elon- 

 gated, and mostly curved or decumbent. Asci clavate, p. sp. 45-50 x 



