302 



ous, small, iininersed in the shining black stroma, staining the wood or 

 bark around it black, inseparably adnate, extending for an inch or more 

 in length and preferring depressions in the surface of the wood. Sec. 

 Cooke Grev. XI, p. 124, the sporidia are 14 x 7 microns. The specimen 

 in liav. F. Am. 053, on bark of ash, seaboard of South Carolina, has spor- 

 idia 9-11x4.5-0 microns, iind looks more like a smooth form of H. rubig- 

 inosum." 



The above is quoted verbatim from the description as given in Ellis 

 and Everharfs work. The specimens at hand are rather meagre. Our 

 measurements are: Asci 120x9-10 microns, spore-bearing part 85x9-10 

 microns. Spores 12-15 x ('-7 microns. 



On rotten wood of Liriodendrnn, Bloumington, Ind. 



To distinguish from II. nihii/iiiusiint, see under description of tlu> lat- 

 ter. It may also be confused with //. atropurpiirciiiii. but lias a more 

 elegantly jiurple surface and slightly larger spores. 



6. II. perforatum, (Schw. I Fr. 



Sphaeria perforata, Schw. 



Stroma superficial, effused, tubercular-convex or depressed-hemispher- 

 ical (2-4 mm.), often interrui)tedly confluent for several centimeters in 

 narrow (2-4 nnn.) strijis. dirty-brown, dark, or iiui'jilish rust-color, dotted 

 with tlie minute, white-margined, punctiform ostiola. I'erithecia sub- 

 monostichous. globose, small (.25-.33 mm.), lying near the surface of the 

 stroma, crowded, mostly n(}t distinctly prominent. Asci S5-110x7-S mi- 

 crons, spore-bearing part <:0-70 x 7-8 microns. Si)ores S-llx4-(> microns. 

 (E. & E.— Spores 10-14 x. 5-7 microns.) 



On T'lmus. Fraxinus, llbns .uid Sassafras, vicinity of Blooraington, 

 Indiana. Also reported on (^uercus. 



I have frequently found this species with the hemisplierical or tuber- 

 oular-convex form of stroma. When found in this form alone, it is not 

 at all probable that the collector would think of placing it in the effused 

 group. (See note immediately following the key.) 



7. II. cffuftuiii, Nitschke. 



Stroma su])erficial. thin, forming black, crust-like patches of various 

 shapes and sizes, 3-4 mm. across, or often confluently seriate, 3-4 em. or 

 more long by .5-1 cm. wide. Perithecia in a single layer, rather large (the 

 central cavity ))eing about .33-. 5 mm. in diameter), prominent, but usually 

 fattened above, sometimes with a central papilla nnich as in //. annu- 



