LICHENS OF THE STATE OF WASHINGTON 71 



C. Asci 8-spored. 



D. Areoles citrine yellow or greenish yellow 5. R. geographicum 



D. Areoles not citrine yellow or greenish yellow. 



E. Thallus smooth to areolate, gray or brown 7. R. petraeum 



E. Thallus areolate, gray or brown, but always with a purple tinge. 



6. R. grande 



C. Asci 1 or 2-spored ; spores usually more than 40 /i, long. 



F. Thallus squamulose, chestnut-brown or black 2. R. Bolanderi 



F. Thallus areolate, gray or brown 4. R. disporum 



1. Rhisocarpon badioatrinn (Flk.) Th. Fl. Lich. Scand. 1 :613. 1871-1874. 

 Lecidea hadioatra Flk. in Sprgl. Neue Entdeck. 2:95. 1821. 



Biiellia badioatra (Flk.) Korb. Syst. Lich. Ger. 223. 1855. 



Thallus gray, deep slaty brown (R), brown, or reddish brown, determi- 

 nate, thick, areolate or cracked areolate, flat to convex, closely crowded 

 forming a crust or scattered over the black hypothallus. Apothecia circular, 

 0.5-1.0 mm. in diameter, sHghtly immersed or adnate; disk black, flat, 

 proper margin slightly raised, concolorous with the disk ; hypothecium dark 

 brown; paraphyses coherent, tips bluish black; asci 8-spored; spores 

 brown, hyaline when young, oblong or oblong-ellipsoid, 1 -septate, some- 

 times slightly constricted in the middle, 26.0-38.0 x 12.3-18.0 /x. 



On rocks: San Juan Co.: Orcas Island, Mt. Constitution, 2500 ft., 

 1928, 2019. Yakima Co.: Bumping Lake, 3400 ft., 1931, 922. Ferry Co.: 

 Laurier, 1644 ft., 1931, 1445. Olympic Mountains, Boulder Peak, 5500 ft., 

 1935,^. H. Smith 2895. (F). 



2. Rhisocarpon Bolanderi (Tuck.) Herre Proc. Wash. Acad. Sci. 12:106. 



1910. 

 Bitellia Bolanderi Tuck. Gen. Lich. 189. 1872. 



Thallus chestnut brown or black, indeterminate, of small to medium 

 sized squamules, flat to slightly concave, shiny, slightly wavy, margins 

 ascending, under side black, which often shows as an elevated black border, 

 because of the ascending margins. Apothecia circular, 0.2-1.0 mm. in 

 diameter, adnate or sessile ; disk dull black, naked, flat to convex ; proper 

 margin concolorous with the disk, thin, wavy, finally disappearing; hypo- 

 thecium dark brown; paraphyses coherent, tips dark brown with a violet 

 tinge ; asci 2-spored ; spores hyaline, grayish or dark brown, oblong-ellip- 

 soid, muriform, 34.6-50.0 x 17.1-23.1 [x. 



On rocks: Yakima Co.: gulch near Naches, 1350 ft., 1931, 908. Klicki- 

 tat Co.: Bickleton, 3000 ft., 1931, 1668. Okanogan Co.: gulch near To- 

 nasket, 1200 ft., 1931, 1386. Washington Territory, 1882, Suksdorf 201 

 (S). 



3. Rhisocarpon chlorophaeum (Hepp.) Miill. Arg. in Engl. Bot. Jahrb. 



15:519. 1893. 

 Lecidea chlorophaea Hepp in Leight. Lich.-Fl. Gr. Brit. 328. 1871. 



