638 



H. siiboi-biciilare. Tk. 30th KYp. p. fi3. 



Stroma thin, flattened, eriuupent, surrounded by the ruptured 

 epidermis, irro \ving from the inner bark, purplish-brown, then black, 

 the surface slightly uneven as if areolate-riniose. Pcrithecia monos- 

 tiehous. subo-lobose. Ostiola sunken, perforate, sometimes whitish, 

 Spores ime<iU5illy elliptical, colored, .0004-.0005 of an inch long.'' 

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



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

 from If. suborbiculare, Welw. & 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 pauperatum, Karst. Enum. Fungi Lapp, p. 211. 

 Sphtzria mammata, Nj-1. Not. pro Fauna & Flora Fenn. p. 88. 

 Kxsicc. EH. & Evrht. N. A. F. 2d Ser. 2070, 2609. EH. N. A. F. 1181. Rab. F. E. 2955. 



Stroma erumpent, orbicular, 3-5 mm. diara., 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 p.. 

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

 8-10 fi. 



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

 York (Peck): on Py-rus Malus, Carpinus, and Betula, Iowa (Holway). 



The Iowa specimens on birch have the stroma elliptical and 

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

 from each other and separate. 



H. decorticatiini, (Schw.) 



Sphcsria decorticata, Schw. Syn. N. Am. No. 1179. 

 Hypoxylon decorticatum, Berk. Grev. IV, p. 50. 



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

 ,-uri'ace 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. Cke. in Grev. XI, p. 123) 

 12-14x4^. 



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

 (Torrey). 



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

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



