172 LICHENS OF THE STATE OF WASHINGTON 



the thallus is very similar to that of B. disciformis (Fries) Mudd. Apothe- 

 cia 1.0-2.0 mm. in diameter, adnate to sessile, rarely almost immersed; disk 

 black, flat to slightly convex ; proper margin black, thin, entire to flexuous, 

 rarely disappearing; hypothecium dark brown; paraphyses coherent, tips 

 brown; asci 8-spored; spores brown, oblong-ellipsoid, when mature 2-3- 

 septate, 19.0-24.6 x 8.2-11.0 jn. 



On trees or dead wood : San Juan Co. : San Juan Island, Pt. Caution, 

 1928, 1986. Fink (1935) reports this species collected in Washington. 



8. Buellia oidalea (Nyl.) Tuck. Lich. Cahf. 26. 1866. 



Lecidea oidalea Nyl. Memoir. Soc. Imp. Sci. Nat. Cher. 5:127. 1857. 

 Rhizocarpon oidaleum (Tuck.) Fink. 



Thallus olive-buff (R), olive-gray (R), or grayish-white to almost 

 white, crustose, thin and smooth or thick, rough and warty, more or less 

 limited by the black hypothallus. Apothecia 0.5-1.5 mm. in diameter, 

 sessile; disk dull black, flat to convex; proper margin thick, entire, soon 

 disappearing ; hypothecium brown ; paraphyses loosely coherent, thread- 

 like, usually simple, some forked below the slightly enlarged tips; asci 

 1- or 2-6-spored, rarely 8-spored; spores brown, oblong-ellipsoid, muri- 

 form, 28.0-40.4 x 14.0-17.0 ix. 



On trees: Clallam Co.: Lake Sutherland, 590 ft., 1931, 1028. San Juan 

 Co.: Orcas Island, Mt. Constitution, 2500 ft., 1928, 2099. Island Co.: 

 Whidbey Island, 1931, 1769. Kitsap Co.: Hidden Ranch near Bremerton, 

 213 ft., 1930, 1934. Clallam Co. : Port Angeles, 1914, Foster 2623 (F) ; 

 Sequim, 1916, /. M. Grant 808 (F). Thurston Co.: Gate, 1912, Foster 

 1981 (F). King Co. : Ronald Bog, 1912, Foster 2080 (F). 



9. Buellia penichra (Tuck.) Hasse Contri. U.S. Nat. Herb. 17:122. 1913. 

 Buellia oidalea var. penichra Tuck. Syn. N. Am. Lich. 2 :99. 1888. 

 Rhizocarpon penichrum (Tuck.) Merrill. 



Thallus white, grayish-white, or greenish-gray, crustose, smooth or 

 slightly rough, becoming somewhat areolate, occurring in small patches, 

 black hypothallus not always visible. Apothecia 0.3-0.8 mm. in diameter, 

 sessile ; disk dull black, flat to slightly convex ; proper margin turgid, glis- 

 tening, slightly raised, finally disappearing ; hypothecium yellowish-brown ; 

 paraphyses loosely coherent; asci 6-8-spored; spores brown, oblong-ellip- 

 soid, muriform, never more than 5 transverse septa, 19.8-23.1 x 9.9-10.6 /*. 



On trees : Kittitas Co. : Lake Cle Elum, 2200 ft., 1931, 886. Chelan Co. : 

 Rainbow Trail, 3500 ft., 1931, 1267. Columbia Co. : Blue Mountains, 3500 

 ft., 1629. Ferry Co.: Republic, 1912, Foster 2315 (W). Washington Ter- 

 ritory, Suksdorf (F). 



10. Buellia badia (Fries) Mass. Mem. Lichenogr. 124. 1853. 

 Lecidea badia Fries Syst. Orb. Veg. 287. 1825. 



