PLATE 10. 



Perisporieae. 



Fig, 1. Scorias spongiosa, Schw. natural size on limb of Alnus 

 serrulato. 



2. Part of a fertile branch enlarged, showing- spermogonial 



and ascigerous perithecia. 



3. An a sens. 



4. Three sporidia. 



5. (>apnodiuin salicinnin, (Pers.). On bark of Negundo acer- 



oiden] a group of spermogonial and ascigerious peri- 

 thecia considerably magnified. 



6. An ascus. 



* 



7. Three sporidia. 



8. Capnodiuni axillatuin. Cko. natural size on fragment of 



leaf of Catalpa. 



9. A group of spermogonial perithecia, considerably magni- 



fied. 



