Dermea 357 



On branches of Nemopanthes mucronata and Ilex verticillata. 



Type locality: Munith, Michigan. 



Distribution: Michigan and Canada. 



Illustrations: Mycologia 29: 68,/. 1, 77,/. 4-9; 38: 379,/. 

 18, 25; 386,/. J5;400,/. 56. 



ExsiCCATi: ElHs & Ev. N. Am. Fungi 3042; EUis & Ev. Fungi 

 Cohimb. 332. 



6. Dermea bicolor (Elhs) Groves, Mycologia 35: 460. 1943. 



Tympanis bicolor Ellis, Am. Nat. 17: 193. 1883. 

 Cenangium bicolor Sacc. Syll. Fung. 8: 572. 1889. 

 Cenangium dichroum Sacc. Syll. Fung. 8: 1143. 1889. 

 Patinella Brenckleana Sacc. Mycologia 12: 203. 1920. 

 Dermea Brenckleana Seaver, Mycologia 25: 142. 1933. 



Conidial fruiting bodies more or less immersed, splitting the 

 bark and slightly erumpent, circular to elongated, or angular, 

 .2-.8 mm. in diameter, .2-.4 mm. high, yellowish, soft-waxy, 

 containing one to several lobed cavities which open irregularly 

 exposing the greenish to yellowish spore masses; conidiophores 

 lining the cavity, hyaline, cylindric, unbranched, tapering 

 above, 1.5-2.5 X 15-30 m; conidia hyaline fusiform, sickle- 

 shaped, or almost straight, pointed at the ends, simple, or 1- 

 septate, 2.5-4 X 15-25 m; microconidia not observed. 



Apothecia erumpent, usually single, sometimes in more or 

 less elongated clusters, circular, or undulated, sessile, narrowed 

 below, .5-1.5 mm. in diameter, .5-1 mm. high, yellowish or 

 greenish when moist, finally dark-brown to black, leathery to 

 horny, softer when moist; hymenium concave to plane, or 

 slightly convex, greenish when young, becoming dark-brown to 

 black on drying; asci cylindric-clavate, tapering below to a short 

 stalk, 8-spored, reaching a length of 60-80 n and a diameter of 

 8-10 m; spores ellipsoid-fusiform, straight, or slightly curved, 

 simple, or 1 -septate, hyaline, becoming yellowish brown, irregu- 

 larly 2-seriate, 3-4.5 X 12-16 m; paraphyses filiform, simple, or 

 branched, 1.5-2 ju in diameter, the tips scarcely swollen but 

 more or less glued together forming an epithecium. 



On branches of Anielanchier. 



Type locality: Decorah, Iowa. 



Distribution: Iowa to North Dakota. 



Illustrations: Mycologia 25: pi. 20 (lower figure); 35: 460, 

 /. /, 2; 462,/. 3; 38: 379,/. 19, 20; 383, f. 33; 395,/. 45. 



