307 



13. II. anuulutum, (Seliw.) Mout. 



Sphaeriii aniiulata. Schw. 

 Hypoxylon aumilatum, Mont. 



Stroma berai8]>heric-tnbercii]iforiu, about 2-.j mm. across, or irregularly 

 effused and interruptedly confluent-tuberculose. brown isli-black or purplish- 

 black. Perithecia snbglobose, irregularly mimosticlions. large (.75-1 mm.). 

 ^A ith from one fourth to one half of the upper part free, finally annulate- 

 truncate above, with the black, papilllform ostlola in the center of the 

 truncate disk. Asci 90-12.'5 x (7-7 microns, spore-bearing part 65-80 x 6-7 

 microns. Spores 8-9x4-5 micron.s. (E. & E. — Siwres 7-9x3.5 microns.) 



Conmion on bark and wood of Quercus, vicinity of Bloomington, In- 

 diana. 



This species is readily distinguished from //. manjiiiatum (which also 

 has the annulate-truncate perithecia) by its usually smaller stroma, which 

 is very irregular on account of the larger, rounded and prominent peri- 

 il!ecia, while the stroma of the latter species is even and regular. 



i-y. II. sassafras, (Schw.) Berk. 



Sphaeria sassafras, Schw. 

 Hypoxylon sassafras, Berk. 



Stroma scant; perithecia large (1-1.5 mm.), the internal cavity nearly 

 1 mm. in diameter, occurring either singly or aggregated in clusters of 3-8 

 or more, standing in elongated areas mostly in gi'ooves of the bark, some- 

 times flattened or compressed by mutual pressure, with their bases united 

 in a thin str(jnia of a dirty bro\A-nish-black, and with one half or more of 

 their upper part free, sub-truncate above, with a minute, papilliform osti- 

 olum. Asci 110-1.50x4-5 microns, spore-bearing part 05-75x4-5 microns. 

 Spores 7-9 x 3-4 microns. 



On dead fallen Sassafras, vicinity of Bloomington, Indiana. Also re- 

 ported on Liudera, where the perithecia may be more evenly scattered 

 over the matrix. 



I found this species growing in great abundance on dead saplings in 

 a thicket of Sassafras about four miles east of Bloomington, Indiana. In 

 some cases the whole trunk of the tree was thickly covered with the fun- 

 gus. It seems to prefer cracks and grooves in the bark, and thus grows 

 in long, interrupted strips, which are parallel with the trunk, and in most 

 cases a single perithecium wide. 



