120 
lOWAHACADEMY OF SCIENCES. 
102. Hysterographium mori (Schw.) Ellis. 
Perithecia gregarious or crowded; sporidia 3 to 5-septate 
and i|iuriform, constricted in the middle. On decorticated 
wood (oak and sumach). Iowa City. Very common. 
103. Hysterogvapliiiim fraxini (Pers.) Ellis. 
Perifhecia scattered or gregarious; sporidia large, muri- 
form, and 7 to 9-septate. On dead limbs of ash. Decorah, 
Iowa, E. W. D. Holway. 
104. Hysterographium cinerascens Schw. 
Perithecia gregarious or crowded; sporidia 6 to 8-septate 
muriform and constricted in the middle. On decorticated 
wood (butternut). Iowa City, 1904. 
This species seems to conform to the description of H. 
cinerascens and is included under this name here. The 
plants are quite abundant on old butternut wood. 
