256 



(j. R. subiculata (Schw.) Sacc. 



Sphaeria subiculata Schw. 

 Hypoxylon subiculosuni Berk. 

 Rosellinia subiculata Sacc. 



Perithecia thin, usually gregarious or crowded but often more or less 

 scattered in the early stages; globose, brownish-black and shining, mostly 

 superficial, about .75-1 mm. in diameter. Ostiolum small and papilliform. 

 Perithecia seated on a sulphur-yellow, waxy-pruinose subiculum which 

 disappears with age leaving the black, shining perithecia closely resembling 

 R. mutaus. 



Asci cylindrical (p sp.) 6.25 x 90 microns. 



Spores inequilateral, elliptical, brown, 5-6.25 x 10-12.5. 



Ellis and Everhart give asci 6-7 x 80-90. Spores 5-5.5 x 10-12 microns. 



Common on Quercus, Loriodendron. and other rotten deciduous wood 

 near Bloomington, Ind., and Jolietville, Ind. 



7. A', pulveracea (Ehr.) Fekl. 



Sphseria pulveracea Ehr. 

 Sordaria Friesii Niessl. 

 Rosellinia pulveracea Fekl. 

 Rosellinia Friesii Niessl. 

 Sphseria millegraria Schw. 

 Sphseria transversalis Schw. 



Perithecia very small and minutely roughened, about J mm. in diameter, 

 densely gregarious, often forming a continuous crustaceous layer or scat- 

 tered and tending to follow the check marks in the wood. Ostiolum papil- 

 liform, soon perforated. 



Asci cylindrical (p sp.) 9-10x70-75 microns. 



Spores elliptical, brown, 7.5-8.75 x 11-13.25 microns. E. & E. give asci 

 10-12 x 60-70 microns. Sporidia 6-9 x S-15 microns, mostly 7-8 x 10-12. 



Common on water beech and sycamore near Joiletville, Ind. Normally 

 found on decorticated wood while it is yet more or less firm. 



8. R. ligniaria (Grev.) Nke. 



Sphreria ligniaria Grev. 

 Rosellinia ligniaria Sacc. 



Perithecia gregarious or crowded, sometimes forming a crust similar 

 to R. pulveracese and in some cases tending to follow the check marks in 



