108 



Mycologia 



Explanation of Plate 22 (frontispiece) 



I. Aerial hyphae with conidia and with swellings at la on a branch. 

 2a, 2h, 2C. Conidiophores with conidia. 



30,, 3^, 3^^ Sd' Conidiophores with conidia. 

 4a, 4b, 4c. Conidia. 



5. Conidium germinating. 



6. Mass of parallel hyphae from surface of moldy corn kernel. 



Explanation of Plate 23 



I, 2. Hyphae with oil drops and conidia from glycerin solution. 



3. Hyphae and conidia from silage decoction. 



4, 5, 6. Very early stages in formation of perithecium. 



7, 8, 9. Sterile hyphae branching and anastomosing about " central cell." 

 10. Sterile hyphal covering of perithecium sending out branches. These are 

 sometimes tipped with conidia. 



II. Optical section of nearly mature perithecium. Spores still within asci. 



12, 13, 14, 15. Optical sections of mature and nearly mature perithecia, show- 

 ing variations in size. 



