116 NATUEAL HISTOEY BULLETIN 



Cenangium rubiginosum (Fries) Sacc, Syll. Fung. 8: 569, 

 1889. 



Plate 38, f. ii. 



Peziza rubiginosa Fries, Elench. Fung 2 : 7. 1828. 



Plants springing singly or in clusters of 2 to 4 from beneath 

 the bark tapering below into a short stem-like base; hymenium 

 concave, becoming nearly plane ; plants about 2 mm. in diameter, 

 externally reddish-brown and rough, more or less wrinkled; hy- 

 menium darker, nearly black or purplish; asci clavate, 8-spored, 

 125 by 15/u,, spores 1-seriate or slightly crowded near the apex of 

 the ascus, elliptical to fusoid, mostly narrower toward the lower 

 end, pyriform, and unsymmetrical, 17 by 7 to 8/i; paraphyses 

 numerous, a little enlarged upwards. 



On dead limbs of Carpinus caroUniana, Decorah, Iowa, E. W. 

 D. Holway, also reported from London, Canada, and South 

 Carolina. 



The material collected in Iowa is distributed in Ellis, North 

 Am. Fungi, 992. 



According to Saccardo Cenangium riihiginosiim Cooke in 

 Ravenel, Fungi. Am. Exsicc 635 is different. 



While this species seems to have been collected in several lo- 

 calities there is little mention of it in the literature of N. Am. 

 Fungi. 



DERMATEA Fries, Summa Veg. Scand. 362. 1849. 



Apothecia erumpent-superficial, often cespitose at the base, 

 and with a more or less well developed stroma; hymenium con- 

 cave or plane; asci cylindrical to clavate, 8-spored; spores ellip- 

 tical or elongated, simple, hyaline. 



The genus is close to Cenangium. One species which has been 

 described from Iowa material. 



Dermatea olivascens Rehm, Ann. Myc. 5: 80. 1907. 

 Plate 38, f. i. 



Apothecia scattered and oecuring singly or in small clusters at 

 first immersed, becoming erumpent, subglobose becoming patel- 

 liform with the hymenium plane or convex, olive-brown, prui- 



