657 



On the bark of young dead branches of Juglans tomentosa, 

 Bethlehem^ Pa. (Schw.). 



The spec, in Herb. Schw. has the stroma |-1 urn. long, by l|-2 

 mm. wide. Ostiola slightly pr'ominent. S])oridia (free spores, no asci 

 seen) navicular-elliptical, 7-9 x 3i-4 [i. 



U. splieeriostomum, (Schvv.) 



Sphtzria sphtsriostoma, Schw. Syn. N. Am. 1213. 

 Hypoxylon spiusHostomum, Cke. Syn. 1033. 



Short, subpulvinate, carbonaceous, very black, 4-6 mm. long, 

 oblong, acuminate at each end, surface longitudinally striate. On this 

 blackened surface are sphaeriifbrm, globose, scattered ostiola, per- 

 forated with a round opening and connected by a rather long tube 

 with the subjacent perithecia, which are buried in the wood without 

 any real stroma, ovate, rather large, filled with a black mass which, 

 under the lens, appears to be composed of spores like those of a 

 Melanconuim. 



On soft, rotten wood, Bethlehem, Pa. (Schw.). 



The fructification of this species is unknown. 



Hyp«ixylon Beaumontii, B. «& €. 



Hypoxylon nudicolle, B. & C. 



Hyp6xylott geramatuin, B. & C. 



Hypoxylon gregale, (Schw.) 



have already been described under Valsaria. Of these, it is prol)al)le 

 that If. Beavmontii should be removed to Hypoxylon. Berkeley in 

 Grev. makes the sporidia uniseptate, but Cke. Grev. XII, p. 134, finds 

 the si)oridia in the original specimens, in Herb. Berk., continuous. 

 II. gregale, (Schw.) also (sec. spec, in Herb. Schw.) has continuous 

 spoi'idia and is a true Hypoxylon. Hypoxylon minmtum, Cke. in 

 Journ. Mycol. IV, p. 87, is (sec. Cke.) not that species, and must be 

 rejected from the list of North American species. 



Hypoxylon glomus, B. & ('. Grev. IV, p. 51, has the appeaiance of 

 a Diatryjie, but is sterile (Cke. Grev. XII, p. 126). 



H. spondtlinum, (Pr.) 



Sphceria spondylina, Fr. S. M. II, p. 347. 



Hypoxylon spondylinum, Fr. Summa Veg. Scand. p. 383s 



J^ummularia spondylina, Sacc. SyH. 1542. 



Erumpent, variable, convex, subrugose, black outside and inside. 

 Although erumpent, it becomes entirel.y free, not even adnate at the 

 83 



