LICHENS OF THE STATE OF WASHINGTON 101 



Thallus grayish brown, dark brown, olive brown, or black, small or 

 medium sized, one-leafed, irregular in shape, rigid, rough, with coarse 

 reticulated ridges, or papillose, with ridges not prominent ; below rosy gray, 

 yellowish gray, or black, more or less covered with rather long pale or 

 brown fibrils, occasionally these are reduced to papillae or very rarely the 

 surface is smooth. Apothecia when present rather crowded, circular, 0.3-2.0 

 mm. in diameter, adnate or sessile ; disk black, not plicate, flat to convex ; 

 proper margin thin, permanent, flexuous; hypothecium brown; asci 

 8-spored, ventricose ; spores rarely maturing, hyaline, ellipsoid, nonseptate, 

 7.0-15.0 X 5.0-9.9 ^. 



On rock: Columbia Co.: Blue Mountains, 6300 ft., 1931, 1635. Jefifer- 

 son Co. : Summit of Mt. Olympus, 8200 ft., 1907, Frye 71 (W). 



Found only at high elevations, easily recognized by the long abundant 

 fibrils on the lower surface. 



