PLATE 26. 



Cucurbitarieae. 



Fig. 1. Cuciirbitaria Fraxini, E. & E. natural size, on dead ash 

 limb. 



2. Portion of same somewhat enlarged. 



3. Sectional view through the center of a cluster of perithe- 



cia. 



4. An ascus. 



5. A sporidium. 



6. Gibbera Vaccinii, (Sow.) natural size, on Vaccinium twig, 



7. A cluster of perithecia somewhat enlarged. 



8. An ascus. 



9. A sporidium. 



10. Otthia hypoxyloides, E. & E. natural size on dead wood. 



11. A cluster of perithecia enlarged. 

 " 12. An ascus. 



13. A sporidium. 



14. Nitschkia cupularis, (Pers.) natural size on dead limb of 



horse chestnut. 



15. A cluster of perithecia somewhat enlarged. 

 " 16. An ascus. 



17. Two sporidia. 



.. 



