Parasitic Fungi of Illinois. 415 



B. Appendages colored M. erineophila. 



Appendages mostly hyaline 2. 



2. Appendages short (2 times diame- j M, Ravenlii. 



ter of perithecium^ or less ) ( M. alni. 



Appendages usually long (2-4 times j M. quercina 

 diameter of perithecium) ( M. elevata. 



A. Tips of the appendages not recurved. 



1. Appendages colored. > 



M. semitosta, B. & C. 



(Grev. IV., p. 160.) 



Epiphyllous. Mycelium persistent; perithecia few, some- 

 what aggregated, 90-100 /n, delicate, reticulations regular and 

 distinct, about 10 fi; appendages 12 or more, about equal to 

 the diameter of the perithecium, colored throughout, paler to- 

 ward the tip, or the color stopping at a distinct line like a sep- 

 tum, 3 or 4 times dichotomously branched, primary branches 

 long, others short, tips obtuse, not recurved; asci — ; spores 

 small, 10 by 15 /«. 



Mycelium sparing; appendages forked three times, more than twice 

 as long as the diameter of the perithecia; abruptly brown at the base; 

 sporidia 4. — Berkeley, 1. c. 



On Cephalanthus occidentalis : Champaign, Oct. (Waite). 



In the specimens at hand the number of asci and spores 

 cannot be determined. Compared with the description by 

 Berkeley, the appendages are not so long, and only part of 

 them show the abrupt termination of the coloring. 



M. Russellii, Clinton. 



(26th Rep. N. Y. State Mus., p. 80.) 



Amphigenous. Mycelium inconspicuous; perithecia small, 

 75-100 jM., delicate, reticulations regular, distinct, about 10 ^^■', 

 appendages 8-18, many times longer than the diameter of the 

 perithecium, colored for half or two thirds of their length, 

 occasionally septate, simple, bifid, or two or three times irregu- 

 larly branched, branches long, often distorted, tips not swollen 

 or recurved; asci 4-8; spores usually 4, small. 



