40 LICHENS OF THE STATE OF WASHINGTON 



finally reticulate-ribbed, yellow or greenish yellow soredia scattered, also 

 marginal, often on the ribs, medulla white ; below dark brown or blackish, 

 covered with a spongy nap, interspersed with elevated yellow sorediate 

 cyphellae; rather closely attached to the substratum. Apothecia very rare, 

 marginal or scattered, 1.0-2.0 mm. in diameter, sessile; disk dark brown 

 becoming black, flat, thalline margin crenate, finally disappearing; spores 

 brown 1 -septate, 16.5-29.7 x 6.6-8.25 /x. This description was made from a 

 U.S.N. Pacific Exploring Expedition specimen, coll. C. Wright, Cape of 

 Good Hope (T). Tuckerman examined exotic specimens only. 



On bark and rocks: Pacific Co.: Long Beach, 1928, 1925b; Chinook, 

 1940, 2824. San Juan Co. : Waldron Island, Fink (1919). 



The yellow soredia on the upper surface, the white medulla, and the 

 sorediate cyphellae, distinguish this species. 



3. Sticta fuliginosa (Dicks.) Ach. Meth. Lich. 280. 1803. 

 Lichen fuliginosus Dicks. Fasc. PI. Crypt. Brit. 1 :13. 1785. 



Thallus brown, almost black, critrine drab (R), or green-gray (R), 

 small to medium sized, coriaceous-membranaceous, lobes short and rounded, 

 faintly ribbed, beset with dark brown or black isidia, margins slightly wavy 

 to almost entire; below bufif or light brown, covered with a nap of short, 

 silky hairs, interspersed with naked, concave, white or pale buff colored 

 cyphellae; loosely attached to the substratum. Sterile in this state. "Apo- 

 thecia, in a Welch specimen from Mr. Borrer, marginal, smallish, biatoroid, 

 the reddish-brown disk soon convex, and the thin, entire, paler margin dis- 

 appearing. Spores fusiform, 2-4-locular, soon colorless, 25-46 x 7-9 mic." — 

 From {Tuckerman 1882). 



On bark and rock : San Juan Co. : San Juan Island, Friday Harbor, 

 1928, 1849; Pt. Caution, 1928, 2001; Univ. of Wash. Oceano. Lab. trail to 

 Heaven, 1904, 3249; Friday Harbor, 1906, Fink 55 (W). Thurston Co.: 

 Gate, 1911, Foster 1932 (W). 



Rather common on rocks near the salt water, the abundant dark colored 

 isidia on the upper surface are a good distinguishing character for this 

 species. 



4. Sticta limhata (Sm.) Ach. Meth. Lich. 280. 1803. 



Lichen limbatus Sm. in Sm. and Sowerb. Engl. Bot. 16: tab. 1104. 

 1803. 



Thallus drab (R), greenish brown, or almost black, small, orbicular, 

 membranaceous, lobes broad, smooth to slightly pitted, beset especially 

 towards the margins with grayish soredia, margins crenate or undulate, also 

 grayish sorediate ; below buff to light brown, covered with soft, fine hairs, 

 interspersed with naked, concave, white, or pale buff-colored cyphellae; 

 loosely attached to the substratum. Sterile in this state. 



On bark: San Juan Co.: San Juan Island, Friday Harbor, 1928, 1997. 

 Turn Island, 1928, 1996. Pacific Co. : Chinook, 1940, 2814. Thurston Co. : 

 Gate, 1940, 2965. San Juan Co. : San Juan Island, 1906, Fink 157 (W). 



