PLATE 39. 



Xylarieae. 



Fig. 1. Xylaria sabterranea, (Schw.) natural size on wood of an 

 old pump standing in a well at Bethlehem, Pa. 



2. Sectional view of a piece of the stroma somewhat enlarged. 



3. An ascus. 



4. Two sporidia. 



5. Ustulina vulgaris, Tul. natural size. 

 G. Portion of stroma enlarged. 



7. Part of an ascus containing six sporidia. 



8. A sporidium. 



9. Nunimularia discreta, (Schw.) natural size on wood of 



"Mountain ash." 



10. Sectional view of enlarged stroma. 



11. An ascus with two paraphyscs. 

 " 12, A sporidium, 



13. Poronia leporina, E. & E. natural size on rabbit's dung 



(Missouri). 



14. Sectional view of a stipitate stroma. 



15. An ascus with three jointed paraphyses. 



16. Two sporidia. 



