LICHENS OF THE STATE OF WASHINGTON 175 



Thallus gray, brownish-olive, or olive-brown (R), crustose, thin, rough, 

 granulate-areolate, continuous or scattered on a thin black hypothallus. 

 Apothecia 0.3-0.8 mm. in diameter, adnate ; disk brown or brownish black, 

 flat to convex; with thin black proper margin, and prominent lighter col- 

 ored crenulate thalline margin, rarely disappearing; hypothecium hyahne 

 or pale brown; spores brown, oblong-ellipsoid, 1-septate, polar-bilocular, 

 19.8-23.0 X 6.6-9.0 fi. 



On rock, trees, or old wood : Spokane Co. : Mt. Spokane, 5808 ft., 1931, 

 1490. San Juan Co.: San Juan Island, Roche Harbor, 1906, Fink 289 

 (W). Washington Territory, Suksdorf (F). 



6. Rinodina oreina (Ach.) Mass. Ricerch. Auton. Lich. 16. 1852. 



Lecanora straminea var. oreina Ach. Lichenogr. Univers. 433. 1810. 



Thallus deep olive-buff (R) or straw yellow (R), crustose becoming 

 squamulose, thin or rather thick, very closely attached to the substratum, 

 verrucose-areolate, areoles small, passing into rather linear, branched, 

 crowded, black-edged squamules at the circumference, often blackish-suf- 

 fused, giving the whole plant a blackish appearance. Apothecia 0.3-0.8 mm. 

 in diameter, immersed to adnate, or subsessile; disk black, turgid, fiat to 

 slightly convex; thalline margin obtuse, concolorous with the thallus, 

 rarely disappearing; hypothecium hyaline; spores brown, ellipsoid, 1-sep- 

 tate, polar-bilocular, 9.0-12.0 x 5.0-7.0 fi. 



On rock: Ferry Co.: Republic, 1912, Foster 2381 (F). No location 

 given, 1913, /. S. Weaver (F). 



For the correct determination of most Rinodina species it is necessary 

 to have good mature fruiting specimens. 



28. PHYSCIACEAE 



Thallus foliose, rarely fruticose, usually circular, appressed or ascend- 

 ing, dorsi-ventral or radial, differentiated into well developed plectenchy- 

 matous cortices, medullary and algal layers, attached to the substratum by 

 rhizoids. Apothecia circular, adnate to sessile; with either a proper or a 

 thalline margin or both, asci 8-spored, spores brown, 1-septate, rarely 

 3-septate, or muriform, thick cell well. 



Alga Protococcus. 



69. Physcia Kgl. Vet. Akad. Nya Handl. 15 :252. 1794. 



Thallus foliose, more or less lobed often sorediate, usually circular in 

 shape, appressed or ascending, upper and lower cortices of vertical extend- 

 ing hyphae, definite algal and medullary layers, medulla cottony, white, 

 saffron yellow, or red ; attached to the substratum by rhizoids. Apothecia 

 round, minute to large, adnate to sessile ; thalline margin concolorous with 

 the thallus ; hypothecium hyaline or dark ; paraphyses unbranched, septate, 

 or rarely nonseptate; asci normally 8-spored; spores brown, oblong or 

 ellipsoid, usually 1-septate, rarely muriform, cell wall thick. 



