LICHENS OF THE STATE OF WASHINGTON 171 



4. Buellia stellulata (Tayl.) Mudd, Man. Brit. Lich. 216. 1861. 

 Lecidea stellulata Tayl. in Mack. Fl. Hibernica 2:118. 1836. 



Thallus white, grayish-white, or gray, crustose, composed of minute, 

 flat to slightly convex areoles, scattered or crowded upon a black hypo- 

 thallus. Apothecia 0.1-0.2 mm. in diameter, immersed to adnate; disk 

 black, flat to somewhat convex ; proper margin black or sometimes slightly 

 gray, thin, long persistent but finally disappearing; hypothecium dark 

 brown; paraphyses subcoherent, thread-like, tips rounded; asci 8-spored; 

 spores brown, ellipsoid, 1-septate, 7.0-9.9 x 4.0-6.1 /x. 



On rocks : San Juan Co. : San Juan Island, 1928, 1947. 



5. Buellia turgescens (Nyl.) Tuck. Gen. Lich. 185. 1872. 



Lecidea turgescens Nyl. Mem. Soc. Sci. Nat. Cherbourg 5 :337. 1857. 



Thallus brown, olive-brown (R), or slightly rufescent, crustose, areo- 

 late, chinky, warty, at length forming a somewhat folded crust. Apothecia 

 0.2-0.8 mm. in diameter, immersed to adnate ; disk black, flat to convex ; 

 proper margin black, thin, sometimes disappearing; hypothecium dark 

 brown; paraphyses free, slender, tips ellipsoid; asci 8-spored; spores 

 brown, ellipsoid, 1-septate, 9.0-16.0 x 4.0-7.0 /x. 



On old wood: San Juan Co.: San Juan Island, 1906, Fink 449 (W). 



6. Buellia alboatra (Hoffm.) Branth. and Rostr. Bot. Tidsskrift. 4. 239. 



1869. 

 Lichen alboater HofTm. Enum. Lich. 30. 1784, 

 Rhizocarpon alboatrum (Hoffm.) Anzi. 



Thallus white or pale grayish white, crustose, thin, at times thicker, 

 smooth to slightly warty, often with a powdery appearance. Apothecia 

 0.3-1.0 mm. in diameter, immersed to adnate; disk black, often white- 

 pruinose, flat to convex ; proper margin black, thin, at length disappearing ; 

 hypothecium brown; paraphyses becoming distant, with slightly enlarged 

 brown tips ; asci 8-spored ; spores brown, oblong-ellipsoid, muriform, 10.0- 

 24.0 x 5.0-9.0 jLt. 



On trees or old wood: Clallam Co.: Elwha River, 244 ft., 1940, 2875. 

 San Juan Co.: Waldron Island, 1906, Fink 251 (W). Herre (1917) 

 reports it from Whatcom Co.: "common on trunks of trees, especially 

 Douglas spruce." 



7. Buellia lauri-cassiae (Fee) Miill. Arg. Rev. Mycol. 9:85. 1887.^ 

 Lecidea lauri-cassiae Fee Suppl. Essai Cryptog. Ecorc. Officin. 101. 



1837. 

 Buellia parasema var. triphragmia (Nyl.) Th. Fr. 



Thallus olive-gray (R), dark gray, grayish-white, or yellow-white, 

 crustose when young, thin and smooth, but soon becoming thicker and 

 rouo-h, chinky and at length areolate, black hypothallus not often visible. 



