LICHENS OF THE STATE OF WASHINGTON 33 



Thallus of small tawny-olive or brown squamules, imbricated, margins 

 ascending, crenate, well covered with steel-blue to slate-gray warts, often 

 gray sorediate, near the center squamules often disappearing and a granu- 

 lose crust appearing; below brown or blackish; hypothallus indistinct. 

 Apothecia 0.5-1.0 mm. in diameter, adnate to sessile; disk reddish brown to 

 black, flat becoming convex, the thin proper margin soon disappearing; 

 hypothecium pale yellow; spores hyaline, ovoid-ellipsoid, sharply pointed, 

 more pronounced at one end, nonseptate, 16.5-26.4 x 6.6-11.5 /x. 



On soil, moss, and rock : Pacific Co. : Beard's Hollow, 1931, 782. Chelan 

 Co. : White Rock Camp, 2200 ft., 1057 ; Rainbow Trail, 3800 ft., 1251a; 

 Dirty Face Mt., 3500 ft., 1098. Clallam Co. : Bird's Port Angeles, 1914, 

 Foster 2664 (F). 



This species is rather easily distinguished by the steel-blue or slate-gray 

 warts and gray soredia on the margins of the squamules. 



3. Parmeliella microphylla (Swartz) Miill. Arg., Flora 72:507. 1889. 

 Lichen microphyllus Swartz, Vet-Akad. Handl. 301. 1791. 

 Pannaria microphylla Mass. 



Thallus of very small light yellowish-olive (R), fawn color (R), or 

 brown squamules, imbricated, margins lighter colored, ascending; below 

 dark brown or black. Apothecia 0.4-1.0 mm. in diameter, adnate to sub- 

 sessile; disk reddish brown or black, flat to convex; proper margin soon 

 excluded; hypothecium hyaline; spores hyaline, ellipsoid, nonseptate, 

 14.0-23.1 X 5.0-6.0 fji. 



On soil, moss, and rock: Chelan Co.: Merritt, 2186 ft., 1931, 1085. 

 Clallam Co. : Port Angeles, 1914, 2769 (F). Mason Co.: Mt. Elinor, 4000 

 ft, 1912, Foster 2110 (F). 



The very small squamules and light-colored margins are the determining 

 characters for this species. 



22. Pannaria Del., in Bory, Diet. Class. Hist. Nat. 13.20. 1828. 



Thallus granulose, squamulose or foHose; a dark hypothallus often 

 present or a white cobweb one, of felted hyphae, a well-developed typical 

 cortex on the upper surface, definite algal and medullary layers, and a thin 

 lower cortex. Apothecia disciform, adnate to sessile ; proper margin present, 

 thalline margin concolorous with the thallus ; hypothecium hyaline, faintly 

 colored, or brownish; paraphyses rarely branched; asci 8-spored; spores 

 hyaline, nonseptate. 



Alga Gloeocapsa. 



A. Usually on soil or moss, rarely on rock or bark ; hypothallus when 

 present white, thalline margin drab colored; spores minutely warted. 



1. P. pezizoides 



A. Usually on bark, rarely on soil or rock ; hypothallus black, thalline mar- 

 gin grayish white ; spores smooth 2. P. rubiginosa 



