LICHENS OF THE STATE OF WASHINGTON 35 



Alga Scytonema and Gloeocapsa. 



A very small genus. A single species within the state. 



1. Massalongia carnosa (Dicks.) Korb. Syst. Lich. Ger. 109. 1855. 

 Lichen carnosus Dicks. Fasc. PI. Crypt. Brit. 2:21. 1790. 

 Pannaria carnosa (Dicks.) Rabh. 



Thallus of small squamules, when dry, brown, lighter colored at the 

 edge, when moist, the whole squamule is bluish green, lobate, suberect, 

 imbricated, granular-crenate ; below whitish. Apothecia small 0.2-0.5 mm. 

 in diameter, sessile; disk dark red, flat, proper margin thin and entire; 

 hypothecium pale yellow; spores hyaline, oblong-fusiform, to ellipsoid, 

 1-septate, 23.1-24.8 x 5.6-7.0 /x. 



On rock or soil among mosses : Yakima Co. : American River Camp, 

 2800 ft., 1931, 944. Clallam Co.: Olympic Hot Springs near Port Angeles, 

 1914, Foster 2869c (F). 



24. Psoroma Nyl. Mem. Soc. Sci. Nat. Cherbourg 3 :175. 1855. 



Thallus squamulose; hypothallus absent; upper cortex of pseudo- 

 parenchyma or of interwoven hyphae, definite algal and medullary layers, 

 thin lower cortex of densely interwoven hyphae. Apothecia medium sized to 

 large, disciform, adnate to sessile ; both proper and thalline margins present, 

 thalline concolorous with the thallus ; hypothecium hyaline or pale yellow ; 

 paraphyses unbranched, coherent, asci 8-spored ; spores hyaline, nonseptate. 



Alga Protococcus. 



1. Psoroma hypnorum (Vahl.) S. Gray, Nat. Arr. Brit. PI. 1:445. 1821. 

 Lichen hypnorum Vahl. Icon. PI. Dan. 6; fas. 16. Pannaria hypnorum 

 (Vahl.) Korb. Parmelia hypnorum (Vahl.) Ach. 



Thallus of yellow, reddish brown or grayish squamules, minute, rounded, 

 granulate, crenate, ascendant, often imbricated, closely attached to the stems 

 and leaves of the mosses among which they grow, usually concealed some- 

 what by the moss, paler below. Apothecia medium sized to large, 2.0-5.0 

 mm. in diameter, numerous, circular, sometimes irregular in shape, sessile ; 

 disk red-brown, flat to concave ; thalline margin thin, conspicuous, granu- 

 lose, concolorous with the thallus ; spores hyaline, ovoid-ellipsoid, non- 

 septate, 16.0-22.8 X 7.6-12.0 ^. 



On soil, also over moss and twigs : Pierce Co. : Mt. Rainier, trail to 

 Moraine Park, 3300 ft., 1940, 2986. Yakima Co. : Dewey Lake, 4800 ft., 

 1940, 2772. Mt. Rainier, 6500 ft., 1895, Piper 525 (W). Clallam Co.: 

 Olympic Hot Springs, 1914, Foster 2869b (F). 



25. Hydrothyrfa Proc. Essex. Inst. 1 :188. 1853. 



Thallus foliose, thin membranaceous; pseudoparenchymatous cortex 

 better developed on the upper surface than the lower; a partially distinct 

 algal layer and a medullary layer of compact filaments are present ; without 

 rhizoids. Apothecia submarginal near the tips of the lobes, sessile, biatorine ; 



