334 



The North American Cup-Fungi 



Apothecia usually occurring in cespitose clusters on a stro- 

 matic base, sessile, or with a short, thick, stem-like base, usually 

 light-colored, whitish, or yellowish, rarely exceeding 1 mm. in 

 diameter, tubercular, or discoid, usually soft and fleshy; asci 

 broad-clavate, usually 8-spored; spores ellipsoid, simple, or 

 becoming tardily several-septate; paraphyses hyaline, or sub- 

 hyaline and usually free, not agglutinated and not usually forming 

 an epithecium. 



Type species, Peziza carpinea Pers. 



On non-coniferous hosts. / 



On Betulaceae. 



On Carpinus caroliniana. 

 On Corylus rostrata. 

 On Alnus or Betula. 

 Spores small, fusoid. 

 Spores large ellipsoid or ovoid. 

 Spores 8-12 X 18-32 n. 

 Spores 7-10 X 15-20 m- 

 On Rosaceae. 

 On Crataegus. 



Spores 15-17 X 35-48 m- 

 Spores 10-12 X 20-25 m- 

 Not on Crataegus. 



Apothecia at first club-shaped, on Anielan- 



chier. 

 Apothecia at first subglobose. 

 On Rnbtis spp. 

 On Rosa sp. 

 On Aceraceae. 



Spores ellipsoid 20-27 n long. 

 Conidial stage spike-like. 

 Conidial stage not spike-like. 

 Spores subglobose 6-8 X 7-10 m- 

 On Cornaceae. 



Spores 7-8 X 20 ju. 

 Spores 10-13 X 28-34 m- 

 On Salicaceae. 



Spores 10-12 X 25-30 ix. 

 Spores 5-6 X 18-20 fx. 

 On various other hosts. 



Apothecia reddish-purple, on Castanea. 

 Apothecia ochraceous. 

 On Viburnum. 

 On Hamamelis. 

 On Rhamnus. 

 On coniferous hosts. 



On branches of Pinus and Abies. 

 On leaves of Abies. 



6. P. crataegicola. 



7. P. olivascens. 



8. P. pruinosa. 



9. 

 10. 



P. Rubi. 



P. Brenckleana. 



1 1 . P. spiculata. 



12. P. acericola. 



13. P. spicata. 



14. 

 15. 



P. cornicola. 

 P. Corni. 



16. P. ocellata. 



17. P. Populi. 



18. P. purpurascens. 



19. 

 20. 

 21. 



P. minuta. 



P. Hamamelidis. 



P. Morthieri. 



22. 

 23. 



P. livida. 



P. phyllophila. 



