70 The North American Cup-Fungi 



Type locality: Near Balboa, Panama. 

 Distribution: Known only from the type locality. 

 Illustrations: Mycologia 34: 587,/. 1-4. 



9. CIBORINIA Whetzel, Mycologia 37: 667. 1945. 



Stroma a definite sclerotium of the discoid type, black, 

 circular, subcircular, or occasionally elongated, thin, flat, or on 

 drying somewhat concavo-convex, foliicolous, persistent, or 

 deciduous; spermatia present, globose or ovoid, hyaline, in mass 

 pale-yellow. 



Apothecia, one to several arising from each sclerotium, cup- 

 shaped to shallow saucer-shaped or discoid, small to medium, 

 1-5 mm. in diameter, reddish to brown, or nearly white; asci 

 usually 8-spored; spores simple, hyaline, ellipsoid; paraphyses 

 slender, usually swollen at the tips. 



Type species, Sclerotinia Whetzelii Seaver. 



On leaves of Populus tremuloides. 



Apothecia usually one to each sclerotium, large, 2-10 



mm. in diameter. 1. C. Whetzelii. 



Apothecia several to each sclerotium small, .5-1.5 mm. 



in diameter. 2. C. hifrons. 



Not on Populus tremuloides. 



On leaves of Salix. 3. C. foliicola. 



On Erythronium. 4. C. Erythronii. 



On petioles of Magnolia. 5. C. gracilipes. 



1. Ciborinia Whetzelii (Seaver) comb. nov. (Plate 89.) 



Sclerotium bifrons Ellis & Ev. Fungi Columb. 155; Sacc. Syll. Fung. 14: 1169. 



1899. (in part). 

 Sclerotinia bifrons Whetzel, Mycologia 32: 126. 1940. Not Sclerotinia 



bifrons Seaver & Shope. 1930. 

 Sclerotinia Whetzelii Seaver , Mycologia 32: 127. 1940. 

 Ciborinia bifrons Whetzel, Mycologia 37: 668. 1945. 



Sclerotia formed in the living leaves, circular, or irregularly 

 subcircular in form, persistent or dehiscent. 



Apothecia occurring on sclerotia lying on the ground, stipitate, 

 at first cup-shaped, expanding and becoming subdiscoid, brown- 

 ish, 2-10 mm. in diameter; stems 5-25 mm. long; asci clavate or 

 subclavate, reaching a length of 150-200 m and a diameter of 

 9-12 jLt; spores 1-seriate, ellipsoid, 4-7 X ll-16iu- 



On sclerotia dehisced from the leaves of Populus tremuloides 

 and lying on the ground. 



