304 



On Acer and Fagus, vicinity of Bloomington, Indiana. 



Tbis species is distinguished from //. coccincum by the radiate-fibrous, 

 concentric-zoned structure of the stroma, wliicli is lacking in the latter, 

 and also by its much smaller spores. 



Specimen No. 2245 in the Indiana I'niversity Herbarium is a peculiar 

 form, having a thin orange-colored or brick-red crust which peels o£f 

 easily, and shows only a few scattered perithecia. This is perhaps an 

 immatui'e specimen. ^ 



10. II. coccineum, Bull. 



Sphaerla fragiformis, Pers. 



Sphaeria rubra, Willd. 



Sphaeria lycoperdoides, Weigel. 



Sphaeria radians, Tode. 



Sphaeria tuberculosa. Sow. 



Sphaeria bicolor, DC. 



Sphaeria lateritia, DC. 



Lycoperdon pisiforme. Sow. 



Iiyci)]K'r(l()n Aiirinlnsuni, Lin. 



Stromatosphaeria fragiformis, (Jrev. 

 Stroma glolx/se or snbgbtbose. erumi)ent, turning llic hark daru m 

 streaks for a short distance around, then superficial, completely liidinz 

 tlie scar where it Itroke through the outer bark, deep brick-red when 

 mature, often p-aler when young, sometimes turning darker with age after 

 maturity, 2-1(> mm. in diameter; interior homogeneous and of an even 

 sooty or gray-black color; surface evenly mannnillose from the slightly 

 p-rojecting perithecia ; finally solitary or joined together in tufts of two. 

 three, or more. Perithecia peripherical in a single layer, subglobose or 

 ovate, sliglitly prominent, crowded. ..33-..") mm. in diameter. Asci 11.5-140 

 X (j-S microns, spore-bearing ijart 7(>-!X> x (i-s microns. Spores black, often 

 2guttulate, 10-14 x .5-7 microns. {K. & E. — Sjiores 10-12x4-5 microns.) 



On bark of dead Fagus, vicinity of Bloomingt<m, Indiana. Also re- 

 ported on other trees such as Quercus, Salix and Betula. This is one of 

 our most conunon sjiecies. 



11 II. fusrnm, (Pex'S.) Fr. 



Sphaeria fusca, Per.s. 

 Si>haeria fragiformis, Hoff. 

 Sphaeria confluens, Willd. 

 Sphaeria tuberculosa. Bolt. 



