LICHENS OF THE STATE OF WASHINGTON 113 



0.2-0.6 mm. in diameter, immersed, often urceolate ; disk reddish brown or 

 black, concave; proper margin rather thick, concolorous with the thallus, 

 or brownish black, sometimes difficult to distinguish from the thallus, 

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

 11.0-18.0 X 5.0-8.0 /t. 



On rock, often inundated: Pierce Co.: Mt. Rainier, Berkeley Park, 

 6000 ft., 1940, 3040. Yakima Co. : Lodge Pole Pine Camp, 3500 ft., 1940, 

 3305. Washington Territory, Suksdorf 273 (S). 



The brick red thallus makes this a very easy Lecanora to identify. 



6. Lecanora laevata (Ach.) Nyl. in Not. ur Sallsk. Faun, et Fl. Fenn. 

 Forhandl. 8 :137. 1866. 



Sagedia laevata Ach. Kgl. Vet.-Akad. Nya Handl. 164. 1809. 

 Lecanora cinerea var. laevata (Ach.) Tuck, 



Thallus dirty gray, greenish gray, or pale brown, crustose, thin, smooth 

 or slightly rough, cracked, sometimes almost angular, areolate, at times 

 showing a black hypothallus ; no color change with KOH, CaOClg, or IKI. 

 Apothecia circular, 0.2-0.5 mm. in diameter, immersed; disk black, con- 

 cave ; thalline margin concolorous with the thallus, often hard to distinguish 

 from the thallus, thin, then swollen ; asci usually 8-spored ; spores hyaline, 

 ellipsoid, nonseptate, 15.0-31.5 x 9.0-15.0 ii. 



On rock: Clallam Co.: Olympic Hot Springs, A. H. Smith 2147 (M). 

 Herre (1943) reports this species from Mt. Baker, 6000 ft., Whatcom Co. 

 Fink (1935) reports it from Washington. 



7. Lecanora verrucosa Ach. Lich. Univ. 354. 1810. 

 Urceolaria verrucosa Ach. Lich. Univ. 339. 1810. 

 Parmelia verrucosa (Ach.) Sprgl. 



Thallus white, gray, or greenish gray, crustose, rather thick, warty 

 (verrucose), tartareous (powdery) ; no color changes with KOH, CaOClj, 

 or IKI. Apothecia circular, 0.5-1.0 mm. in diameter, immersed, finally sub- 

 sessile; disk black, deeply concave to flat, sometimes grayish pruinose, 

 often almost closed ; proper margin thin, hidden more or less by the thalline 

 margin, which is concolorous with the thallus, at first rounded and inflexed, 

 becoming flexuous; asci 8-spored; spores hyaline, broadly ellipsoid, non- 

 septate, 30.0-53.0 X 16.0-37.0 /.. 



On moss and soil: Klickitat Co.: Goldendale, 1909, Foster 1156 (F). 

 Washington Territory, Brandegee 581 (F). 



This lichen is characterized by the habitat and the large sized spores. 



8. Lecanora atra (Huds.) Ach. Lichenogr. Univers. 344. 1810. 

 Lichen ater Huds. Fl. Ang. 1 :445. 1762. 



Thallus grayish white, Isabella color (R), or deep olive buff (R), crus- 

 tose, moderately thick, composed of granules, becoming warty, and often 

 areolate; yellow with KOH, no color change with CaOCl, or IKI. 



