303 



latum, but not so distinctly nnniilate-depressed. Asci 90-110 x S-ti microns, 

 spore-bearing part 55-05 x 5-G microns. Spores ovate-oblong, pale brown, 

 8-10x3-4.5 microns. (E. & E.— Spores 9-10.5x3.5 microns.) 



On decorticated I'lmns, near site of university reservoir, Bloomington, 

 Indiana. 



Tlie stroma in this species is very scant. The peritbecia are sparingly 

 fused or confluent so that there is not much substance aside from that 

 comprised in the peritbecia themselves. 



S. H. multiforme, Fr. 



Sphaeria nuiltiformis, Fr. 



Sphaerla peltata, DC. 



Sphaeria rubiformis, Pers. 



Hypoxylon granulosum, Bull. 

 Stroma erumpent and often margined by the ruptured bark, of various 

 shapes, at first rounded, tlien spreading and becoming somewhat flattened 

 above, dull rusty-red, finally black and smootli. Peritbecia irregularly 

 inonostichous, rather large (1 mm.), globose, distinctly prominent, with 

 papilliforin ostiola. Asci cylindrical, on long pedicels, 95-110 x(i-7 microns, 

 spore bearing part 00-70x0-7 microns. Spores 9-12x4.5-0 microns. (E. 

 & E. — Spores 9-10.5x3.5 microns.) 



On Fagus, Ulmus and Juglans, vicinity of Bloomington, Ind. Also 

 reported on Betula (where the stroma is usually transversely elongated), 

 Alnus, Sorbus, Quercus and Castanea. 



Specimen No. 2193 in the lierbarium at Indiana University seems to 

 be the most typical one in our collection. Several other specimens in the 

 same herbarium were identified by Dr. Peck as depressed forms. They 

 have somewhat smaller peritbecia. 

 ,9. H. lloweianum, Pk. 



Stroma globose or depressed-globose, 5-15 mm. across; surface brick- 

 red or someti.mes orange colored or slightly olivaceous, becoming darker, 

 almost smooth but densely punctuate with the minute, black ostiola ; sub- 

 stance of a shining blue-black or brown-black color and showing a radiate- 

 fibrous structure, usually with from one to three or more faint, concentric 

 zones. Peritbecia ovate, .25-.75 mm. high, peripherical in a single layer, 

 with scarcely more than the minute ostiola projecting. Asci 75-90x4-5 

 microns, spore-bearing i)art 50-GO x 4-5 microns. Spores 7-S x 3-4 mici'ous. 

 (E. «& E. — Asci, spore-bearing part 45-50x5 microns. Spores 0-7x3-3.5 

 microns.) 



