308 



/.3, 77. roliacrcns. (Pers.) Fr. 



Spliaeria cohaereus. Pers. 



Stroma enimpeiit-snporfieial, irregularly sul)«lobose or depressed- 

 hoiuispherical, usually about 2-4 uuu. in diameter, gregarious or crowded, 

 often conflueut. at first diity Im'owh. becoming black or nearly black. Peri- 

 thecia irregularly mouo.stichous, usually 5 to 15 or 20 iu a stroma, large 

 (.75-1 mm.), with papilliform ostiola. Sometimes the perithocia are dis- 

 tiuctly prominent, forming an irregular stroma composed of a few, large, 

 rounded in'iitliecia loosely joined together. Asci 100-150x0-7 microns, 

 si)ore-b('aring jiart ('."'(-Iio .\ ('-7 microns. Spores .s-12 x 3.5-5.5 microns. 



("onnnon on bark of Fagus, near P.loomington, Indiana. 



Some forms of this sjiecies slightly reseml)le //. annulatum, from 

 which it is distinguished by the absence of the annulate-truncate disk on 

 the perithecia. (ttbei' forms resemble //. tiirhiiiulatum, but the latter 

 usually has less prominently projei-ting perithecia, with more prominent 

 o.stiola, a larger number of iicritliecia in a stroma, and is more turbinu- 

 hitely narrowefl below. 



10. II. tiirhiinilittiiiii. (S<-hw.) P.erk. 



Sithaeria turbinulata, S<hw. 



Stroma turbinate-pulvinate, 2-(i nmi. in diameter, subcontinent, but 

 with the stroniata nearly always distinct, at first brown, then black. The 

 slromala arc ari-angcd in a seriate manner so as to bear stmie I'esemblance 

 to Hebrew letters, and are sometimes seated on a black crust which over- 

 spreads the l)ark. I'erithecia large, scattered through the entire stroma, 

 with small, scattered, but conspicuous ostiola which are the most promi- 

 nent part of the perithecia above the .surface of the stroma. Asci 120-140 

 x5-6 microns, spore-bearing part 70-80x5-0 microns. Spores 9-11x3.5-5 

 microns. (E. & F. — Spec, in Herb. Schw., Spores 8-10x3.5-4.5 microns.) 



On dead l)ark of Fagus, neighborhood of Blooraington, Indiana. 



To distinguish this species from 77. cohaercii.9, see under description 

 of the latter. 



All figures in this jiajier ai-e practically natui'al size. 



Indiana University, 

 lilooin ington, Indiana. 



