LICHENS OF SANTA CRUZ PENINSULA 385 



times tawny, dusk}-, or blackenin<; ; margin swollen, entire or 

 more or less crenate or denticulate. Spores '^^g'* mic. 



On granite cliffs 250-300 feet above the sea, near Point 

 San Pedro, and on sandstone at Pescadero Point, 50 feet above 

 the ocean. Not common. 

 Lecanora bolanderi TwcV. Proc. Am. Acad. 6: 266. 1864; 



Syn. N. Am. Lich. i : 181. 1882. 



2. LECANORA THAMNITIS Tuck. 



" Thallus papillate-fruticulose, made up of short, erect, fasti- 

 giately divided trunks which are crowded densely together into 

 an effuse crust (or pass now into compact, rounded peltate 

 clumps) ; pale straws-colored ; apothecia middling to ample, 

 sub-terminal ; disk from pale-yellowish passing into tawny-red, 

 margin crenate. Spores ovoid-ellipsoid, '^^ "^^'^•" Lich. Calif. 

 p. 20. 



"Sandstones of the Pacific coast ; Oakland hills, and S. Bruno 

 (Bolander), Tuckerman, 1. c. 1866." Tuckerman, Synopsis 

 N. Am. Lichens, Part I, p. 181 ; 1882. 



San Bruno, mentioned above, is in San Mateo county and the 

 lichen should occur with us but thus far I have been unable to 

 discover it. Tuckerman states that it is probably but a form of 

 L. bolander i. 

 Lecanora thamnitis Tuck. Lich. Calif. 20. 1866; Syn. N. 



Am. Lich. I : 182. 1882. 



3. LECANORA PHRYGANITIS Tuck. 



Thallus short, terete, rigid ; simple or irregularly short- 

 branched; tufted, or forming low, rounded, intertangled mat- 

 like clumps, the branches longer and decumbent at the circum- 

 ference ; covered with yellowish gray-green granules or powder ; 

 beneath brown or blackening basally ; apothecia not seen, all 

 our specimens being sterile. Tuckerman states, Syn. N. Am. 

 Lich. Vol. I, p. 182 : " apothecia middling to ample, lateral, 

 sub-sessile ; disk pale-brick-colored, margin flexuously lobed ; 

 spores oblong, ellipsoid, ^'^^ mic." 



Abundant on granite cliffs above the sea near Point San 



