172 HERRE 



Lecanora bolanderi Herre. Proc. Wash. Acad. Sci. 7: 384. 1906. 

 Lecanora thamnitis Tuck. Lich. Calif. 20. 1866. 

 Lecanora thamnitis Tuck. Syn. N. Am. Lich. I: 181. 1882. 

 Lecanora thamnitis Herre, Proc. Wash. Acad. Sci. 7: 385. 1906, 

 (copied from Tuckerman). 



Thallus fruticose, short, rigid, dichotomously divided, ultimately 

 forming dense clumps, but all stages occur from diffuse, crustose 

 forms to orbicular, fruticose clumps; branches terete, erect, blunt; 

 color a yellowish green. Apothecia terminal, of medium size, becom- 

 ing large ; disk concolorous or decidedly yellowish, sometimes tawny, 

 dusky or blackening; margin swollen, entire, or more or less crenate 



or denticulate; spores ovoid-ellipsoid, — ^^ /^. 



10 — 14 



On granite cUffs 250-300 feet above the sea near Point San Pedro, 

 on sandstone at Pescadero Point and near Pigeon Point Lighthouse, 

 and on metamorphic rocks about San Francisco; not common. 



After an examination of Tuckerman's material and my own mate- 

 rial collected by Bolander as well as myself, I am unable to separate 

 bolanderi and thamnitis. 



So far as I am aware, recorded only in CaUfornia, from OHma, 

 Marin County, the Oakland Hills, the Farallone Islands, and the 

 Santa Cruz Peninsula. In the Report of the Fur Seal Investiga- 

 tions, Part III, p. 383, i896-'97 (1899) Lecanora thamnitis is given by 

 W. W. Calkins in a Hst of Hchens collected on St. Paul Island in 1891. 

 If this is correct, the range extends to Bering Sea. 



2. LECANORA PHRYGANITIS Tuck. 



Lecanora phryganitis Tuck. Lich. Calif. 19: 1866. 



Lecanora phryganitis Tuck. Syn. N. Am. Lich. I: 182. 1882. 



Lecanora phryganitis Herre, Proc. Wash. Acad. Sci. 7: 385. 1906. 



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 circumference; covered with 

 sorediose yellowish gray-green granules or powder, or sometimes 

 with large soredia; beneath brown, or blackening basally; apothecia 

 very rare, only two or three fertile specimens being found; these ter- 

 minal, medium to large, fiexuous, the disk tawny yellowish. 



