116 LICHENS OF THE STATE OF WASHINGTON 



14. Lecanora poly tro pa (Ehrh.) Rabh. Deutschl. Krypt. Fl. 2:37. 1845. 

 Verrucaria poly tro pa Ehrh. Hoffm. Deutschl. Fl. 196. 1796. 

 Lecanora varia var. polytropa (Ehrh.) Dietrich. 



Thallus white, pale green, or yellow, crustose, granulate, or areolate, 

 thin and scattered, often disappearing entirely or rather thick and rough; 

 yellowish with KOH, no color change with CaOClj. Apothecia circular, 

 0.2-1.0 mm. in diameter, adnate to subsessile; disk yellow, pinkish buff 

 (F), fawn color (R), or brown, naked, flat to convex; thalline margin 

 concolorous with the thallus, thin, flexuous and often disappearing; asci 

 8-spored; spores hyaline, ellipsoid, nonseptate, 9.0-15.0 x 5.0-7.0 ju.. 



On rock: Olympic Mountains, Steeple Peak, 1935, A. H. Smith 2313 

 (F). Mt. Rainier National Park, Glacier Basin, 1925, /. M. Grant 418 

 (F).Herre (1943). 



15. Lecanora rupicola (L.) Zahlbr. Cat. Lich. Univ. 5:525. 1928. 

 Lichen rupicola Linn. Mant. 1 :132. 1767. 



Lecanora sordida (Pers.) Th. Fr. 



Thallus brownish white or gray, crustose, determinate, areolate, often 

 circular, smooth or cracked, the areoles raised, circumference somewhat 

 squamulose; bright yellow with KOH, no color change with CaOClg. 

 Apothecia circular, 0.5-1.0 mm. in diameter, immersed, finally adnate; disk 

 usually black, at times pale flesh color, densely pruinose; thalline margin 

 concolorous with the thallus, thin, entire, often crenate and flexuous, finally 

 disappearing; asci 8-spored; spores hyaline, ellipsoid, nonseptate, 9.0-17.0 

 X 5.0-8.0 II. 



On rock : San Juan Co. : Shaw Island, 1928, 1949. Clallam Co. : Sequim, 

 1916, /. M. Grant 556, 559 (F). Olympic Mountains, Hurricane Ridge, 

 6000 ft., A. H. Smith 2396 (M). Klickitat Co.: Goldendale, 1909, Foster 

 1192 (F). Ferry Co. : Republic, 1913, Foster 2424 (F). 



A variable species, but the densely pruinose disk is constant and makes 

 identification easy. 



16. Lecanora subfusca (L.) Ach. Lichenogr. Univers. 393, 1810. 

 Lichen subfuscus Linn. Sp. PI. 1142. 1753. 



Thallus dirty white, gray, greenish gray, or cream buff (R), crustose, 

 usually thin and smooth or rough, at times becoming thicker, then granu- 

 lose-verrucose or warty-areolate ; yellow with KOH, no color change with 

 CaOClg. Apothecia circular, numerous crowded, becoming irregular in 

 shape, 0.5-2.5 mm. in diameter, adnate to sessile; disk brown, reddish 

 brown, or brownish black, naked (not pruinose), flat to somewhat convex; 

 thalline margin concolorous with the thallus, thin, entire to crenate or 

 flexuous, persistent; asci 8-spored; spores hyaline, ellipsoid, nonseptate, 

 13.2-20.0 X 5.6-11.0 /t. 



On bark or old wood, rarely on rock or moss: Pacific Co.: Loomis 

 Lake, 1931, 773; Chinook, 1931, 452. San Juan Co.: San Juan Island, Pt. 



