118 LICHENS OF THE STATE OF WASHINGTON 



On bark, wood, more rarely on rocks : King Co. : Snow Lake Trail, 

 3500 ft., 1931, 1135. San Juan Co. : San Juan Island, Roche Harbor, 1905, 

 Frye (F). San Juan Island, 1906, E. T. and S. A. Harper (F). 



20. Lecanora melanaspis Ach. Lichenogr. Univers. 427. 1810. 

 Parmelia melanaspis Ach. Meth. Lich, 196, 1803. 



Thallus whitish, gray, warm buff (R), reddish brown, or brown, sub- 

 foliose, thick, becoming turgid, in the center warty-areolate, at the circum- 

 ference linear, stellate-imbricate lobed ; yellow then red almost immediately 

 with KOH, no color change with CaOClg. Apothecia circular to angular, 

 0.4-2.0 mm. in diameter, adnate to subsessile ; disk reddish black, brownish 

 black, or black, sometimes pruinose, often tumid, flat to convex; thalline 

 margin concolorous with the thallus, becoming irregular, rarely dis- 

 appearing; asci 8-spored; spores hyaline, ellipsoid or ovoid, nonseptate, 

 8.6-13.2 X 7.0-9.0 fi. 



On rock: Yakima Co.: cliff near Naches Ranger Station, 2400 ft., 

 1940, 3317. Ferry Co.: Mt Gibraltar, 3100 ft., 1940, 2762. Garfield Co.: 

 Pomeroy, 1860 ft., 1574. Ferry Co. : Republic, 1913, Foster 2395 (F). This 

 specimen determined as L. melanaspis var. stellata Th. Fr. by Zahlbruck- 

 ner, but this variety is now included in the species. Washington Territory, 

 Brandegee 22 (S). 



21. Lecanora muralis (Schreb.) Rabh. Deutschl. Krypt. Fl. 2:42. 1845. 

 Lichen muralis Schreb. Spicil. Fl. Lips. 130. 1771. 



Thallus light greenish-oHve (R), pale yellow, or brown, subfoliose, 

 orbicular, tartareous, in the center consisting of scales or areoles, at the 

 circumference of sinuate lobes, fiat or plicate with crenate margins; no 

 color change with KOH or CaOClg; rather closely attached to the sub- 

 stratum by hyphal rhizoids. Apothecia circular to angular, due to crowding, 

 0.4-1.0 mm. in diameter, adnate to subsessile; disk yellow, tawny (R), or 

 brown, flat; thalline margin concolorous with the thallus, thin, crenate, 

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

 8.0-16.0 x 4.0-7.0 fx. 



On rock: Chelan Co.: Beaver Summit, 2800 ft., 1931, 1336; Zena, 800 

 ft., 1931, 1107b; Junior Pt. Lookout, 7000 ft., 1940, 3112. Columbia Co.: 

 Dayton, 1700 ft., 1940, 2727, 2735. Klickitat Co.: Goldendale, 1909, Foster 

 1166 (F). Spokane Co.: Spokane, 1907, Bonser (F). 



The close attachment of the bluish black tinged and lobed margins of 

 the thallus to the substratum is a definite distinguishing characteristic for 

 this species. 



22. Lecanora peltata (Ram.) Steud. Nomenclat. Bot. 237. 1824. 



Lichen peltatus Ram. in Lam. and DC Fl. Franc. 3rd ed., 2 :377. 1805. 

 Lecanora var. heteromorpha Ach. Lichenogr. Univers. 412. 1810. 



Thallus greenish straw-colored or pale brown, squamulose, orbicular, 

 consisting of small closely united groups of squamules, or sometimes of a 



