General Features 



19 



dried material, which is certainly much more unsatisfactory than 

 fresh material would have been. 



While no exhaustive observations have been carried on, it 

 can be stated that the eccentricity of the ascostome is a character 

 common, if not universal, in species of Phillipsia, Cookeina and 





Fig. 10. Asci and spores of Cookeina CoJensoi showing eccentric ascostomes 

 and the comparatively large size of the spores. 



Wynnea, which genera are essentially tropical although one 

 species of Wynnea has been reported from the north. It has 

 also been observed in Plectania hiemalis, a northern species but 

 one which resembles Cookeina in many respects. It seems to 



Fig. 11. 



Asci and spores of Wynnea americana showing eccentric ascostomes 

 and comparatively large size of the spores. 



make no difference whether the apothecium is plane, concave, 

 regular or otherwise. This character appears also to be accom- 

 panied by certain other morphological characters. The spores 

 are unusually large, fusoid, unequal-sided and in nearly every 

 case marked with the peculiar striations consisting of light and 



