LICHENS OF THE STATE OF WASHINGTON 139 



Thallus dark brown or chestnut-brown (R), foliose, suborbicular, ap- 

 pressed, imbricated, lobes laciniate, somewhat ascending, smooth or sHghtly 

 channeled, segments often much entangled, margins crenate, crisped, some- 

 times with dark colored papillae ; below various shades of brown or black, 

 with a few scattered rhizoids. Apothecia numerous, often entirely covering 

 the lobes, marginal, 1-9 mm. in diameter, adnate; disk chestnut brown, 

 concave to flat, sometimes irregular and dilated ; thalline margin entire or 

 rugose, crenulate; spores hyaline, ellipsoid, nonseptate, 5.0-10.8 x 3.3-6.0 ^. 



On rocks : King Co. : Snow Lake Trail, 3500 ft., 1931, 831. Pierce Co. : 

 White River Camp, 3900 ft., 1928, 1897; Mt. Rainier, near Paradise River, 

 1909, Foster 1062 (W) . 



Dark marginal papillae help to identify this species. 



2. Cefraria glauca (L.) Ach. Meth. Lich. 296. 1803. 

 Lichen glaucus Linn. Sp. PI. 1148. 1753. 



Thallus sea-foam yellow (R), pale grass green (R), pale glaucous 

 green (R), ivory yellow (R), ohve-buff (R), or gray, foliose, mem- 

 branaceous, smooth or slightly lacunose, occasionally sprinkled with grayish 

 white soredia or isidia, lobes narrow or broad, entire, crenate, sinuate or 

 lacerate, margins ascendant, often thickened, crenate, jagged, often soredi- 

 ate, more rarely isidiose; below white, brown, or black, often black with 

 brown margins, or brown with white margins, dull or shiny, smooth or 

 lacunose, rhizoids rare, if present very small and scattered. Apothecia rare, 

 marginal or submarginal, 2-6 mm. in diameter, adnate; disk chestnut, 

 brown, flat, wavy, thalline margin irregular and disappearing ; spores hya- 

 line, ellipsoid, 4.6-6.0 x 3.0-4.0 /.. Thallus blue with IKI. 



On trees or fallen branches, rarely on rock : Pacific Co. : North Head, 

 211 ft., 1930, 457a. Grays Harbor Co.: Lake Quinault, 300 ft., 1931, 1210. 

 San Juan Co. : Friday Harbor, 1928, 2057. Thurston Co. : Gate, 1940, 2967. 

 Kitsap Co.: Hidden Ranch, near Bremerton, 213 ft., 521. Pierce Co.: 

 Silver Springs, 2200 ft., 1931, 1127. King-Kittitas Co.: Snoqualmie Pass, 

 3010 ft., 1931, 813. Chelan Co.: White Rock Camp, 2200 ft., 1931, 1045. 

 Stevens Co. : Boyd's, 1470 ft., 1439. Whitman Co. : Tekoa Mountains, 2900 

 ft., 1597. Columbia Co.: Blue Mountains, 3500 ft., 1931, 1631. San Juan 

 Co.: San Juan Island, 1906, Fink (F). Snohomish Co.: Marysville, 1926, 

 /. M. Grant (F). Pierce Co.: Paradise Park, 1909, Foster (F). 



One of the most common and widely distributed lichens in the state. 

 Plate VI, C, D. Plate VII, A. B. 



3. Cetraria Tuckermani Herre, Proc. Wash. Acad. Sci. 7 :340. 1906. 



Cetraria glauca var. stenophylla Tuck. Syn. N. Am. Lich. 1 :35. 1882. 



Thallus olive-buff (R), greenish gray, or pale straw color, foliose, carti- 

 laginous-coriaceous, lobes narrow elongated, lax, channeled, smooth or 

 slightly pitted, occasionally sorediate or isidiose, margins ascending, rarely 

 entire, crenate to irregularly jagged and torn, often sorediate or with short 

 coralloid branchlets; below usually black, sometimes only black near the 



