90 



Mycolckjia 



Explanation of Plate 20 



1-2. Hypocreopsis lichenoides (Tode) Seaver. i, gross characters, natural 



size; 2, portion of ascus with spores, X 350. 

 3-5. Hypomyces Lactifiuorum (Schw.) Tul, 3, a gill fungus infected with the 

 parasite, natural size ; 4, section through the stroma showing peri- 

 thecia, partially diagrammatic ; 5, ascus with spores, X 350- 

 6-8. Hypocrea rufa (Pers.) Fries. 6, plants natural size ; 7, section through 



the stroma showing perithecia ; 8, ascus with spores, X 350. 

 9—10. Hypocrea latizonata Peck. 9, two plants of Cyathus striatus infected 

 with the parasite, natural size; 10, ascus with spores, X 350. 

 11-13. Chromocrea gelatinosa (Tode) Seaver. 11, several plants natural size; 



12, ascus with spores, X 350; 13, a single plant enlarged. 

 14—15. Chrotnocreopsis cubispora (Ellis & Holw.) Seaver. 14, several plants 

 natural size; 15, ascus with spores, X 350. 

 16. Podostroma alutaceiim (Pers.) Atk. Two plants natural size. 

 17-18. Typhodimn typhinum (Pers.) Seaver. 17, stem of grass infected with 



the parasite; 18, portion of ascus with spores, X 350. 

 19-20. Stilbocrea intennedia (Ferd. & Winge) Seaver. 19, plant enlarged ; 20, 

 portion of ascus with spores, X 350. 



