^ Dermea 365 



reddish-brown to almost black; asci cylindric-clavate, tapering 

 into a short stalk, 8-spored, reaching a length of 85-115 ^ and a 

 diameter of 14-20 m; spores hyaline to pale yellowish-green, 

 ellipsoid-fusiform, straight, or slightly curved, simple, or 1-3- 

 septate, irregularly 2-seriate, 6-10 X 15-22 n; paraphyses hya- 

 line, filiform, usually branched, the tips swollen and glued to- 

 gether forming a yellowish epithecium. 



On species of Fraxinus, Fraxinus nigra. 



Type locality: Europe. 



Distribution: Canada; also in Europe. 



Illustrations: Mycologia 38: 375,/. 13, 14; 386,/. 37; 400, 

 f.55. 



16. Dermea Chionanthi Ellis & Ev. Proc. Acad. Sci. Phila. 45: 

 148. 1893. 



Conidial fruiting bodies erumpent, single, black, about .2- 

 .4 mm. in diameter and .2 mm. high, irregularly rounded to 

 slightly conical, opening widely at the top, fleshy-membranous, 

 containing a single cavity on the base of which the conidiophores 

 are borne; conidiophores hyaline, cylindric, simple, or occasion- 

 ally branched, tapering above to a tip on which the conidia are 

 borne, 3.4 X 12-20 n; conidia elongate-fusiform to subfiliform 

 hyaline, curved, sickle-shaped to almost straight, simple, or 1- 

 septate, bluntly pointed at the ends, 5-7 X 25-35 ju; no micro- 

 conidia observed. 



Apothecia erumpent, gregarious, often more or less in rows, 

 single, or cespitose, sessile, slightly narrowed below, circular, or 

 undulated, .4-1 mm. in diameter, .2-.4 mm. high, dark-reddish, 

 or olivaceous-brown to black, leathery, or horny, softer when 

 moist; hymenium at first concave, becoming plane to slightly 

 convex, reddish-brown to black; asci cylindric-clavate, narrowed 

 below into a rather short stalk, 8-spored, reaching a length of 

 90-110 )u and a diameter of 15-20 n; spores ellipsoid to ellipsoid- 

 fusoid, hyaline, becoming yellowish, simple, often becoming 1-3- 

 septate, straight, or slightly curved, irregularly 2-seriate, 6-7 X 

 18-25 ju; paraphyses hyaline, filiform, simple, or occasionally 

 branched, 1.5-2.5 ^ in diameter, the tips swollen to 3-4 n in 

 diameter and forming an epithecium. 



On branches of Chionanthus virginica. 



Type locality: Wilmington, Delaware. 



Distribution: Delaware and Marvland. 



