LICHENS OF THE STATE OF WASHINGTON 67 



Thallus crustose, granulose, or powdery, sometimes subsquamulose or 

 areolate, smooth or rough, no definite differentiation into layers. Apothecia 

 scattered, circular, rarely immersed, usually adnate, sometimes sessile; 

 proper margin concolorous with the thallus, usually disappearing; hypo- 

 thecium rarely hyaline, usually pale yellow or brown; paraphyses un- 

 branched, free or coherent, tips often knob-like; asci usually 8-spored, 

 rarely 16-spored; spores hyaline, 2-many-septate, with a gelatinous halo, 

 sometimes one end of the spores prolonged into a tail. 



Alga Protococcus. 



A. On moss or soil, hypothecium brown 1. B. sabuletorum 



A. On trees, hypothecium hyaline or yellowish brown. 



B. Hypothecium hyaline, disk pale flesh color (R) or salmon color. 



3. B. albescens 

 B. Hypothecium hyaline or yellowish brown. 



C. Disk always black 2. B. akompsa 



C. Disk never black, reddish yellow or reddish brown 4. B. luteola 



1. Bacidia sabuletorum (Schreb.) Lettau, Hedwigia 52:132. 1912. 

 Lichen sabuletorum Schreb. Spicil. Fl. Lips. 134. 1771. 

 Biatora hypnophila (Turn.) Lonnr. 



Bilimbia sabuletorum (Schreb.) Arn. 



Thallus gray or greenish gray, of thin, crowded, sometimes confluent 

 granules forming a crust, sometimes disappearing. Apothecia circular, often 

 clustered, 0.2-0.8 mm. in diameter, adnate or sessile; disk pale yellow, 

 tawny, or black, flat to convex; proper margin black soon disappearing; 

 hypothecium dusky brown ; paraphyses with brownish knob-like tips ; asci 

 8-spored; spores hyaline, ellipsoid or fusiform, 3-7-septate, 16.5-29.7 x 

 3.7-6.6 /x. 



On moss or soil: Yakima Co.: Little Naches River, 2557 ft., 1931, 

 1002a. San Juan Co.: Roche Harbor, 1906, Fink 246 (W). Rainier 

 National Park, /. M. Grant 433 (F). 



2. Bacidia akompsa (Tuck.) Fink, Cont. U.S. Nat. Herb. 14:90. 1910. 

 Biatora akompsa Tuck. Syn. N. Am. Lich. 2 :47. 1888. 



Thallus pale yellow or ash colored, of minute granules forming a crust, 

 smooth or rough and warty. Apothecia circular, 0.2-0.6 mm. in diameter, 

 adnate or sessile ; disk black, rough, flat to subglobose ; proper margin thin, 

 uneven; hypothecium hyaline or yellowish brown; paraphyses coherent, 

 hair-like; asci 8-spored; spores hyaline, acicular, 3-5-septate, 18.0-22.0 x 

 1.5-2.5 fx, measurements made from type specimen, Biatoria akompsa 

 2872 (T). 



On trees: Islands of Puget Sound, 1906, E. T. Harper. Longmire 

 Springs, 1906, E. T. Harper, Fink (1919). 



3. Bacidia albescens (Krmphbr.) Zwackh. Flora 45:495. 1862. 



