PSILOPEZIA 105 



diameter of 5-8 mm.; hymenium slightly concave, bright-red; 

 hairs dark-brown, thick-walled, septate, reaching a length of 

 more than 1 mm. and a diameter of 35-40 m near the base, 

 gradually contracted below and often forked at the base, tapering 

 above into a bristle-like apex; asci cylindric or subcylindric above, 

 reaching a length of 250 m and a diameter of 20 m; spores 1-seriate, 

 parallel with the ascus or diagonally disposed, at first smooth, 

 becoming sculptured at an early stage, 14-17 X 25-30 /x; spore- 

 sculpturing taking the form of distinct and regular reticulations, 

 the ridges of the reticulations 1-2 ju deep and giving to the spore 

 surface a very rough appearance; paraphyses about 2 ^^ in 

 diameter below, rather strongly enlarged above. 



On old wood. 



Type collected in deciduous woods along the Youghiogheny 

 River, Pennsylvania, by W. A. Murrill (Herb. The New York 

 Botanical Garden). 



Distribution: Pennsylvania. 



14. PSILOPEZIA Berk. London Jour. Bot. II. 6: 325. 1847. 



Fleischhakia Rab. Hedwigia 17: 114. 1878. 

 PeltidiumKa\chhr.Hedwigia2: 58. 1862. Not PeHidium ZoW'ik. 1820. 



Apothecia medium-sized, usually not exceeding 1 cm. in 

 diameter, becoming flattened or subdiscoid, closely adhering to 

 the substratum and usually surrounded by a sterile border, 

 occasionally with the margin free and slightly elevated; hy- 

 menium slightly concave, plane or more often convex, usually 

 dark-colored, brown or brownish, more rarely bright-colored, 

 yellow or orange; asci cylindric or subcylindric, 8-spored, usually 

 spirally marked; spores ellipsoid, smooth or more rarely sculp- 

 tured, hyaline or subhyaline; paraphyses stout. 



Type species, Psilopezia yiummularia Berk. 



Apothecia dark-brown or reddish-brown. 

 Spores smooth. 



Spores 12 X 20-25 m. 1. -P. nummularia. 



Spores 15-17 X 22-25 m- 2. P. hydrophila. 



Spores 15-17 X 30-36 m- ■?• P- deligata. 



Spores becoming rough. 4. P. trachyspora. 

 Apothecia yellow or orange. 



Spores 7 X 12-14 m- 5. P. flavida. 



Spores 12-13 X 20-24 /x- 6. P. aqimtica. 



