42 



The North American Cup-Fungi 



longitudinally by light and dark bands; paraphyses straight or 

 hooked at their apices and usually enlarged above. 



Apothecia springing in clusters from a sclerotium which is 



buried in the ground. 

 Apothecia usually isolated and not springing from a scle- 

 rotium. 

 Spores striate with light and dark bands. 

 Spores not striate. 



27. Wynnea. 



28. Phillipsia. 



29. scodellina. 



Tribe 7. Sarcoscypheae. Apothecia stipitate, or rarely 

 sessile, tough and inclined to coriaceous (not shrinking much 

 in drying), bright-colored or brown to blackish, growing attached 

 to buried or partially buried sticks (except the genus Paxina, 

 the plants of which genus grow on the ground), externally 

 densely tomentose or bristly; stem very variable in length, its 

 length often depending on the depth at which the substratum is 

 buried, occasionally wanting, slender or more often thick, even 

 or corrugated; asci operculate, 4-8-spored; spores smooth, but 

 often marked with longitudinal light and dark bands as in 

 Wynnea and Phillipsia, or minutely sculptured; paraphyses 

 usually slender but variable. 



Apothecia bright-colored, yellow to scarlet within ; mycelium 

 white. 

 Spores striate and hairs fasciculate; plants tropical. 

 Spores not striate and hairs not fasciculate; plants 

 temperate. 

 Apothecia dark-colored, brown to blackish; mycelium 

 usually dark-colored. 

 Apothecia with a thick gelatinous hypothecium. 

 Apothecia without thick gelatinous hypothecium. 



Apothecium opening with a star-shaped aperture or 



splitting Geaster-Yike; growing attached to sticks. 

 Apothecium not opening with a star-shaped aperture; 

 growing on the ground. 



30. COOKEINA. 



31. Plectania. 



32. Bulgaria. 



33. Urnula. 



34. Paxina. 



Tribe 8. Pezizeae. Apothecia sessile or with an incon- 

 spicuous stem, externally smooth or nearly so, occasionally 

 slightly tomentose, varying in size from one to several centi- 

 meters in diameter; hymenium concave, plane or convex, bright- 

 colored or more commonly brownish or blackish; asci cylindric 

 or subcylindric, operculate, 8-spored; spores elHpsoid to fusoid, 

 hyaline or rarely faintly colored, smooth or sculptured; paraph- 

 yses very variable, usually filiform. 



