170 



Mycologia 



Fig. 8. Sporodochiura from the same culture as fig. 7, after the spore mass 

 was removed showing the cup shaped body with lobed margin. X 20. 



Fig. 9. Section of young cylindrical sporodochium from strawberry. The 

 sporophores from the base are much longer than those from the sides. X 100. 



Fig. 10. Section of a conidial fructification from strawberry. The spore 

 mass free from the sporophores. X 300. 



Plate 9. Pycnidial stage, Sclerotiopsis coticava (Desm.) Shear & Dodge 



Fig. 11. Pycnidia on cane of black raspberry. Note the lines radiating 

 from each pycnidium showing the effect of the fungus in causing a wrinkling 

 of the host tissues. 



Fig. 12. Pycnidia on dead leaf of Steironema ciliatum showing concave 

 condition of the mature, dried fruit body, dehiscence not yet occurred. X 2 J / 2 . 



Fig. 13. Immature pycnidia on leaf of Epilobium. X 12. 



Fig. 14. Pycnidia on dewberry canes. The longitudinal cracks show 

 where the cuticle has ruptured. The walls of the pycnidia are still un- 

 broken. X 15. 



Fig. 15. Pycnidia from the specimen shown in Fig. n, but more highly 

 magnified to show the irregular cracking of the pycnidial wall in dehiscence. 



Fig. 16. Section of a very small mature pycnidium showing the original 

 orientation of cells in the upper wall and the middle, dark colored tissue in 

 the basal wall. X 240. 



Fig. 17. Cross section of an overwintered pycnidium on dewberry cane, 

 showing the cuticle and the cuticularized layer of the epidermis tightly 

 stretched, and region at the center showing where the walls of spores are 

 being transformed into a mucilaginous substance the swelling of which bursts 

 the pycnidium. X 80. 



Plate 10. Ascogenous stage, Pezizella lythri (Desm.) Shear & Dodge 

 (except fig. 18). 



Fig. 18. An old sporodochium (a) and a young pycnidium (b) on rotting 

 strawberry. The spore cavity in the pycnidium is just being formed. The 

 dark colored middle layer of the wall along the base is well shown here. X 80. 



Fig. 19. Section of a mature discocarp from dewberry. The spores are 

 deeply stained. X 300. 



Fig. 20. Section of a discocarp showing a stalk-like base, from leaf of 

 wild blackberry. The discocarps originate intraepidermally. This is evident 

 as portions of epidermal cells are clearly seen at the base. X 150. 



Fig. 21. Part of a section of a discocarp highly magnified, showing the 

 arrangement of the spores in the asci, and the paraphyses projecting above 

 the asci. X 600. 



Fig. 22. Small but old discocarp from dewberry leaf showing portions of 

 the epidermis among the cells at the base. X 150. 



