638 



H. suborbiculare, Pk. 30th Eep. p. 63. 



" Stroma thin, flattened, erumpent, surrounded by the ruptured 

 epidermis, growing from the inner bark, purplish-brown, then black, 

 the surface slightly uneven as if areolate-rimose. Perithecia monos- 

 tichous, subglobose. Ostiola sunken, perforate, sometimes whitish. 

 Spores unequally elliptical, colored, .0004-.0005 of an inch long." 

 Mr. Peck considers this an ally of H. Laschii, Nits. 



On bark of Acer saccharinum, New York (Peck). Different 

 from H. suborbiculare, AVelw. & Curr., and with that probably refer- 

 able to Nummularia. 



H. Morsel, B. & C. Grev. IV, p. 51. 



Hypoxylon Blakei, B. & C. Grev. IV, p. 52. 

 .Hypoxylon pauperaium^ Karst. ^num. FuBgi I^app. p. 211, 

 SphiEria j/iammata, Nyl. Not. pro Fauna & Flora Fenn. p. 88. 

 Exsicc. Ell. & Evrht. N. A. F. 2d Ser. 2070, 2609.— Ell. N. A. F. 1181.— Rab. F. E. 2955. 



Stroma erumpent, orbicular, 3-5 mm. diam., closely embraced by 

 the ruptured epidermis, flattened above, brownish-black and papillose 

 from the prominent ostiola, surrounded by a black, circumscribing line. 

 Perithecia large (about 1 mm.), submonostichous, mostly only slightly 

 prominent, 4^15 in a stroma. Asci linear-cylindrical, 110-120 x 12 /i. 

 Sporidia uniseriate, oblong-elliptical, brown, 1-2-nucleate, 17-22 x 

 8-10 fi. 



On Alnus, Maine (Blake), New Hampshire (Mrs. Harrison), New 

 York (Peck); on Pyrus Mains, Carpinus, and Betula, Iowa (Holway). 



The Iowa specimens on birch have the stroma elliptical and 

 larger (1 x 1| cm.) and the perithecia have'a tendency to crack away 

 from each other and separate. 



H. decorticitura, (Schw.) 



SpkesHa decorticata^ Schw. Syn. N. Am. No. 1 179. 

 Hypoxylon decorticatum^ Berk, Grev. .TV, p. 50. 



Subpulvinate, flattened when on the wood, less so on the bark, 

 surface rusty-gray and densely covered with rough, sphseriiform tuber- 

 cles resembling ostiola, so as to appear roughened with black granules. 

 Perithecia peripherical in several layers, ovate-globose, immersed in 

 the dark rust-colored stroma. Pulvinuli subrotund or irregular, about 

 5 mm. across, often confluent. Sporidia (sec. Oke. in Grev. XI, p. 123) 

 12-14 X 4 /i. 



On wood and bark, Bethlehem, Pa. (Schw.), New England 

 (Torrey). 



The spec, of this species in Herb. Schw. has sporidia 8-10 x 4J //, 

 and has the same general appearance as H. perforatum, (Schw.). 



