58 



ASCOMYCETES 



4 Ascocarps springing from a sclerotium. 

 Ascocarps not springing from a sclerotium. 



5. Spores one-celled. 

 Spores at length 2-4-celled. 



6. Substratum colored green. 

 Substratum uncolored. 



7. Ascocarps hairy externally. 

 Ascocarps naked. 



8. Ascomata resting on an extended arachnoid mycelium. 

 Ascomata -without arachnoid mycelium. 



SCLEROTINIA. 



5- 



6. 



rutstroemi.\. 



Chlorosplenium. 



ClBORIA.* 



8. 

 15- 



9- 



10. 



Eriopeziza. 

 Arachnopeziza. 



Lachnellula. 

 II. 



Desmazierella. 



12. 



13- 



14. 



13- 



14 



9. Spores remaining one-celled. 

 Spores becoming several celled. 



10. Spores globose. 

 Spores ellipsoid or elongate. 



11. Disc surrounded with black hairs. 

 Disc smooth. 



12. Paraphyses obtuse at the apex. 

 Paraphyses lancet-shaped at the apex. 



Walls of ascoma delicate ; spores mostly one-celled, sometimes two- 

 celled at maturity. 

 Walls of ascoma thick ; spores two-celled at maturity 



Spores remaining one-celled. 

 Spores at length several-celled. 



Spores globose. 



Spores ellipsoid or fusiform. 



Spores filiform. 



16. Spores remaining one-celled. 

 Spores at length two-four-celled. 



17. Border of disc smooth. 

 Border of disc toothed. 



18. Ascocarps sessile, rarely compressed at base. Belonium. 

 Ascocarps stalked, or at least compressed like a stalk. 9. 



19. Walls of ascoma waxy ; stem short and delicate. Belonioscypha. 

 Walls of ascoma waxy, thick ; stem thick. Helotium. 



* Some species of Piloci'atei-a may also be sought here, 

 j Some forms of Helotium may be sought here. 



15 



Dasyscypha. 

 Lachnella. 



Lachnum. 

 Erinella. 



PiTYA. 



16. 



20. 



17- 



18. 



Hymenoscypha. -f 

 Cyathicula. 



