LICHENS OF THE STATE OF WASHINGTON 31 



A very common Leptogium west of the Cascades, perhaps the most 

 common Leptogium in the state. Easily identified by the tubular ends of 

 the lobes. 



4. Leptogium pilosellum Merrill Bryol. 14:38. 1911. 



Thallus when dry, dark ivy green (R), when moist, dark green (R) or 

 Cedar green (R) ; orbicular, medium sized, surface smooth to scabrous, 

 expanded to somewhat appressed, margins undulate, at times white pilose ; 

 below the same color as upper surface, sparsely covered with white rhizoids. 

 Apothecia 0.5-0.8 mm. in diameter, circular, adnate to subsessile ; disk 

 bright red to reddish brown, flat ; thalline margin white pilose ; hypothecium 

 hyaline to cloudy; spores hyaline, fusiform-ellipsoid, 1-septate, 13.2-23.1 

 X 6.9-7.3 IX. 



On mosses over rock: Chelan Co.: Merritt, 2186 ft., 1931, 1078h. 

 Klickitat Co. : Goldendale, 2000 ft., 1931, 1687; Goldendale, Foster 1186, 

 Merrill's Type (F). 



5. Leptogium pulchellum (Ach.) Nyl. Memoir Soc. Sci. Nat. Cherbourg 

 5: 32. 1857. Collema pulchellum Ach. Syn. Lich. 321. 1814. 



Thallus, when dry, deep grayish blue green, when moist, green ; medium 

 sized to large, surface smooth to somewhat wrinkled, lobes round imbri- 

 cated, margins wavy ; below paler much wrinkled. Apothecia rather numer- 

 ous, scattered, 0,5-2.0 mm. in diameter, circular, sessile to subpedicellate ; 

 disk reddish brown, flat to slightly concave; thalline margin thin concol- 

 orous with the thallus; hypothecium brownish; spores hyaline, ellipsoid, 

 muriform, 18.0-34.2 x 7.0-9.9 /x. 



On bark and rock : Pacific Co. : Fort Canby, 1930, 486. Reported from 

 the state by Fink (1935) and by Herre (1917) from the lowlands of 

 Whatcom Co. 



6. Leptogium tremelloides (L.) S. Gray, Nat. Arr. Brit. PI. 1 :400. 1821. 

 Lichen tremelloides Linn. Suppl. PI. 450. 1781. 



Thallus lead colored, same color whether dry or moist, medium sized, 

 suborbicular, closely attached to the substratum, surface coralloid-granu- 

 lose, lobes ascending, imbricated, margin entire to undulate ; below lighter 

 in color. Apothecia 0.5-1.0 mm. in diameter, circular to irregular, sessile 

 to subpedicellate; disk reddish brown, concave becoming convex; thalHne 

 margin entire to irregular, sometimes disappearing, concolorous with the 

 thallus; hypothecium hyaline to brownish; spores hyahne, ovoid-ellipsoid, 

 muriform, 18-28 x 8-11 ju,. 



On bark and rock: Whatcom Co.: Sumas Mountain, Herre (1917) ; 

 reported from the state by Fink (1935). 



14. PANNARIACEAE 



Thallus foliose, squamulose, or crustose ; dorsi-ventral ; upper cortex of 

 pseudoparenchymatous tissue, algal layer and medulla always present, lower 

 cortex sometimes lacking; dark hypothallus ordinarily present; usually ^..--—t--..,.,,^ 



