74 



The North American Cup-Fungi 



proximately 2 mm. long, 1 mm. thick, pale ashy-gra^', surface 

 irregularly furrowed or wrinkled; stem of uniform diameter 

 throughout, brownish, smooth, paler above; asci cylindric, or sub- 

 cylindric; spores, fusoid, one side often flattened, 3-4 X 9-12 fx; 

 paraphyses thick, enlarged at their apices. 



On disintegrating leaves of Betula lutea. 



Type locality: Duchesnay, Quebec, Canada. 



Distribution : Known only from the type locality. 



Illustrations: Mycologia 37: 691,/. 30, 31. 



11. SCLEROTINIA Fuckel, Symb. Myc. 330. 1871. 



Apothecia arising from a definite tuberoid, elongated, or 

 irregular sclerotium, usually formed in the living or recently 

 killed tissues of the host, more rarely apparently disconnected 

 with any host, at first rounded, becoming cup-shaped, urn- 

 shaped or discoid; asci clavate-cylindric, usually 8-spored; 

 spores ellipsoid to fusoid, simple, hyaline; paraphyses filiform, or 

 slightly enlarged above. 



Type species, Peziza sckrotiorum Lib. 



Sclerotia occurring unattached to any host. 

 Sclerotia closely associated with a host plant. 

 On monocotyledons, grasses or sedges. 

 On seeds of Secale. 

 On stems or leaves. 

 On Juncus. 

 On Carex. 



Apothecia large, 2 4 cm. in diameter. 



Apothecia small, less than 1 cm. 



Sclerotia small, .3-1 mm. in diam- 

 eter on leaves of host. 

 Sclerotia large, 7 mm. -2 cm. long. 

 Sclerotia 1-7 mm. long. 

 Sclerotia 2-2.5 cm. long. 

 On dicotyledons, various species. 

 On flowers or seeds. 

 On seeds. 



On Tilia americana. 

 On Nyssa sylvatica. 

 On flowers of Camellia. 

 On leaves or stems. 

 On leaves. 



On Potentilla. 



On lettuce, Lactiica and other garden 

 plants. 



1. S. tuberosa. 



2. S. temulenta. 



3. 5. juncigena, 



4. S. Caricis- 



ampnllaceae. 



5. 5. paludosa. 



6. S. longisclerotialis. 



7. S. Diiriaeana. 



