78 The North American Cup-Fungi 



Apothecia brown, small, cupulate, then becoming almost 

 plane, reaching a diameter of 1.2-2 mm.; stem reaching a length 

 of 2-4 mm. and a thickness of .3 mm.; asci cylindric, attenuated 

 at the base, with a short, stem-like base, 8-spored; spores 1-2- 

 seriate, simple, containing two oil-drops, 5 X 12 14 ;u; paraphyses 

 numerous, filiform, septate, agglutinated and brown at the tips, 

 1-4 n thick. 



On overwintering leaves of Carex exsiccata. 



Type locality: Grand Mesa, Colorado. 



Distribution: Grand Mesa National Park, Colorado. 



Illustrations: Mycologia 25: pi. 37, f. 6-7. 



6. Sclerotinia longisclerotialis VVhetzel, Mycologia 21 : 28. 1929. 



Sclerotia usually one or two or sometimes three in each culm, 

 remaining enclosed even at maturity, not discharging by the 

 breaking of the culm as in Sclerotinia Duriaeana, somewhat 

 exposed by a narrow slit in the epidermis, at maturity black, 

 oblong, truncate, uniform in thickness, more or less 3-angled, 

 striate due to the pressure of the vascular strands of the culm 

 during development, originating as a loose, cottony weft of 

 white mycelial hyphae in the interior of the culm, gradually 

 thickening, forming a firm body at first of a pinkish color, 

 gradually changing to a smoky-gray on the exterior, finally 

 black, the ends capped by a long, pointed weft of white mycelium 

 continuous with the mycelium in the tissues of the culm, at 

 maturity varying in size with the slenderness of the host culm, 

 reaching a length of 1-7 cm. and a diamater of 1-2 mm. 



Apothecia 2-5 mm. broad, goblet-shaped with mouth con- 

 stricted, stipitate, dark fawn-colored, usually one to each scle- 

 rotium; stem slender, reaching a length of 15-30 mm.; asci 

 cylindric, attenuated below, reaching a length of 170-230 /n and 

 a diameter of 9-15 jjl, 8-spored; spores strongly unequilateral, 

 flat, or incurved on one side, averaging 8 X 18 ju; paraphyses 

 simple, very slender, slightly clavate. 



On species of Carex, C. prairea, C. interior, C. crinita, C 

 vesicaria and C. retrorsa. 



Type locality : New York. 



Distribution: New York and Maine. 



Illustrations: Mycologia 21: pi. 4, pi. 5,f. 20-22; Farlowia 

 2^: pi. 5,f. 19-22. 



