34 LICHENS OF THE STATE OF WASHINGTON 



1. Pannaria pezisoides (Weber) Trevis. Lich. Vene. No. 98. 1869. 

 Lichen pesizoides Weber. Spicil. Fl. Goet. 200. 1778. 

 Pannaria hrunnea (Swartz) Mass. 



Thallus of small to very small squamules ; when dry grayish brown or 

 sepia (R), when moist greenish blue, imbricated, often crowded into a 

 granulose mass, margins crenate ; hypothallus when present white cobweb- 

 like. Apothecia often large and numerous, irregular in shape due to crowd- 

 ing, adnate; disk orange-cinnamon (R), brick-red, or reddish-brown, flat 

 to convex; thalline margin drab colored (R), crenulate; hypothecium pale 

 yellow, spores hyaline, ellipsoid to ellipsoid-pointed, minutely warted, non- 

 septate, 24.7-28.0 X 8.9-11.1 ,.. 



On soil or moss, more rarely on rock : Grays Harbor Co. : Lake Qui- 

 nault, 300 ft., 1931, 1203. Clallam Co. : Lake Crescent, 483 ft., 1931, 1036. 

 Pierce Co. : Mt. Rainier, Berkeley Park, 6000 ft., 1931, 623; trail to Seattle 

 Park, 4000 ft., 1940, 3055. Cascade Mountains, 1925, Grant (F). Clallam 

 Co. : Port Angeles, 1911, Foster 1772 (W). 



The usually persistent crenulate drab-colored margin helps to distin- 

 guish this species. 



2. Pannaria rnhiginosa (Thunbg.) Del. in Bory, Diet. Class. Hist. Nat. 

 13 :20. 1828. 



Lichen rubiginosus Thunbg. in Ach. Lich. Suec. Prodro. 99. 1798. 



Thallus orbicular, of smoke gray (R), greenish gray, or various shades 

 of pale yellow squamules, closely attached to the substratum, imbricated 

 margins deeply divided, raised, grayish white granular-crenate. Apothecia 

 0.5-1.5 mm. in diameter, numerous and crowded, sessile; disk red to red- 

 dish brown, flat to slightly concave ; when present thalline margin is promi- 

 nent, grayish white crenulate, concolorous with the thallus; hypothecium 

 pale yellow or brownish; spores hyaline, ellipsoid, nonseptate, 11.2-16.5 

 X 6-11 /JL. 



On bark, more rarely on rock : Pacific Co. : Long Beach, 1928, 1925a; 

 Chinook, 1940, 2816. Chelan Co.: Stehekin, 1140 ft., 1931, 1285. Pierce 

 Co. : Mt. Rainier, trail to Seattle Park, 4000 ft., 1940, 3046. Clallam Co. : 

 Port Angeles, Bird's, 1914, Foster 2664 (W). Grays Harbor Co.: West- 

 port, 1908, Foster (W). Determined as Pannaria hrunnea Mass. by G. K. 

 Merrill. 



This species is easily distinguished by the grayish white margins of the 

 squamules and the apothecia. 



23. Massalongia Korb. Syst. Lich. Ger. 109. 1855. 



Thallus squamulose, foliose, at times almost crustose, with a dark rhizi- 

 nose hypothallus, pseudoparenchymatous cortex on the upper surface, 

 decorticate on the lower, a thin algal layer and a spongy medulla. Apo- 

 thecia disciform, sessile; proper margin thin and pale, thalline margin 

 absent; hypothecium hyaline to pale yellow; paraphyses septate, coherent, 

 asci 8-spored; spores hyaline, 1 -septate. 



