140 LICHENS OF THE STATE OF WASHINGTON 



base, becoming white or brown near the tips, sometimes shallow pitted. 

 Apothecia very rare. Thallus blue with IKI. 



On trees: Pacific Co.: Chinook, 1940, 2820. Clallam Co.: Lake Suther- 

 land, 590 ft., 1931, 1031. San Juan Co.: Brown Island, 1940, 3201. Kitsap 

 Co. : Hidden Ranch near Bremerton, 213 ft., 1940, 3294. Pierce Co. : Silver 

 Springs, 2670 ft., 1931, 719; Mt. Rainier, trail to Seattle Park, 4000 ft., 

 1940, 3058. Whatcom Co.: Ruth Mountain, 5500 ft., 1928, L. Sunquist 

 1895 (W). Grays Harbor Co.: Westport, 1919, /. M. Grant (F). Clallam 

 Co.: Sequim, 1915, /. M. Grant (F). San Juan Co.: Friday Harbor, 1906, 

 Fink 84 (W). Olympic Mountains, Camp Elkhorn, 1800 ft., 1907, Frye 

 60 (W). Pierce Co. : Mt. Rainier, 1906, Foster (F). 



A very common species west of the Cascades, A bark lichen easily 

 identified by the long, lax lobes, with black under surface, very rarely 

 fruiting. 



4. Cetraria juniperina (L.) Ach. Meth. Lich. 299. 1803. 

 Lichen juniperinus Linn. Sp. PI. 1147. 1753. 



Thallus bright yellow, straw color (R), lemon chrome (R), yellowish 

 or citrine (R), membranaceous, expanded or tufted, lacunose, lobes narrow, 

 small, irregularly branched, margins erect, often curled, crenate, erose- 

 crenate, or dentate; below paler or the same color. Apothecia numerous, 

 submarginal, 2-12 mm. in diameter, sessile or subpedicellate ; disk chestnut- 

 brown (R), concave to convex; thalline margin crenulate or tuberculate, 

 the same color as the thallus ; spores hyaline, ellipsoid, nonseptate, 4.0-9.9 

 X 3.0-5.0 fi. 



On trees and fallen branches, rarely on rock or soil : San Juan Co. : 

 Friday Harbor, 1928, 2061. Mason Co.: Shelton, 1931, 1221. Kittitas Co.: 

 Easton, 2168 ft., 1931, 835. Yakima Co.: American River Camp, 2800 ft., 

 1931, 956. Chelan Co.: Stehekin, 1140 ft., 1931, 1284a. Ferry Co.: Mt. 

 Gibraltar, near Republic, 3100 ft., 1940, 3149. Whitman Co. : Tekoa Moun- 

 tains, 2900 ft., 1931, 1605a. Cascade Mountains, Brandegee (F). Klickitat 

 Co.: Goldendale, 1909, Foster 1161 (W). Mason Co.: 1890, C. V. Piper 

 13 (W). San Juan Co.: Friday Harbor, 1906, Fink (W). 



The bright yellow thallus with white medulla and the brown disk of the 

 apothecium make this a conspicuous lichen. 



5. Cetraria lacunosa Ach. Meth. Lich. 295. 1803. 



Thallus olive-buff (R), Isabella color (R), greenish-gray, or straw 

 color, cartilaginous-coriaceous, deeply reticulate-lacunose, ridges sometimes 

 isidiose, lobes broad and widely spreading, crowded, irregularly branched, 

 margins ascending, crenate-incised, or sometimes entire, tips rounded; 

 below sometimes almost white, brown, or black. Apothecia numerous, mar- 

 ginal or submarginal, 1-12 mm. in diameter, sessile or subpedicellate ; disk 

 chestnut-brown, concave, thalline margin entire; spores hyaline, ellipsoid, 

 nonseptate, 6.6-8.0 x 3.3-5.0 ^i. Thallus shows no color change with IKI. 



