302 



ons, small, iiiiiiu'i'scd in the sliiuiiii,' hlacU stroma, stjiiiiiiif^ tlu> wood or 

 bark arouiul it black, inseparably adiiate, exteiidinj^ for an iiicli or more 

 ill length and preferrinij depressions in tlie surface of the wood. Sec. 

 Coolce Grev. XI, j). 324, the sporidia are 14x7 microns. The specimen 

 U\ Itav. F. Am. v~w,. on l)ark of ash, seaboard of South Carolina, has spor- 

 idia 9-11x4.5-0 microns, and looks more like a smooth form of //. nihhj- 

 inosum." 



The above is quoted vei'batim from the description as given in I-^Uis 

 and Everhart's work. The specimens at hand are rather meagre. Our 

 measurements are: Asci 120x9-10 microns, spore-bearing pai*t 85x9-10 

 microns. Spores 12-15x0-7 microns. 



On rotten wood of Liriodendron, Bloomington, Ind. 



To distinguish from If. nthii/iiiosiini, see under description of the lat- 

 ter. It may also be confused with 7/. atroinirixirciini. hut has a more 

 elegantly i>urple surface and sii^ditly lar.wr spores. 

 6'. //. iHi-foral mil, (Schw. ( Fr. 



Sphaeria perforata, Schw. 



Stroma superficial, effused, tubercular-convex or depressed-hem isjther- 

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

 narrow (2-4 mm.) strips, dirty-brown, dark, or purplish rust-color, dotted 

 with the minute, white-margined, punctiform ostiola. Terithecia sub- 

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

 stroma, crowded, mostly not distinctly prominent. Asci S5-110x7-8 mi 

 crons, spore-bearing part ('0-70x7-8 microns. Spores S-11 x 4-<i microns. 

 (E. &. E. — Spores 10-14x5-7 microns.) 



On TTlmus, Frnxinus. Khus and Sassafras, vicinity of Bloomington, 

 Indiana. Also reported on Quercus. 



I have frequently found this species witli the hemispherical or tuber- 

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

 at all i>robable that the collector would think of placing it in the effused 

 grouj). (See note innnediately following the key.) 



T. //. cffiixiiHi, Nitschke. 



Stroma supcrlicial. thin, fnrniing black, crust-like patches of v.-irious 

 shaiies and sizes, 3-4 mm. across, or often continently seriate, 3-4 cm. or 

 more long l»y .5-1 cm. wide. I'erithecia in a single layer, rather large (the 

 <-ential «a\ily lieinii .-ibuut .3.".-. 5 nun. in dianirlcrt, prnniinenl. but usually 

 llatfcncd .abuve. sometimes witli a ceiiti'al papilla mmh ;is in //. miiiu- 



