THE LICHEN FLORA OF THE SANTA CRUZ PENINSULA 189 



Thallus effuse, of coarse, uneven areoles separated by broad fis- 

 sures, each areole made up of few to many small, crumb-like granules 

 which become confluent or imbricated; CaCl 2 O 2 ; KOH ; color 

 pale to tawny brown, and blackening. 



Apothecia small to medium size, solitary or clustered, sometimes 

 confluent; disk plane to convex, or turgid, the margin entire or finely 

 toothed, at length excluded; red-brown and blackening; paraphyses 

 rather thick, their tips enlarged and yellow, more or less conglutin- 

 ate; thecium greenish blue to blue with I; spores bilocular, ellipsoid, 



; also - /*; once seen 3-locular, 



12 - 18 r 15 '20- 24.5 r 



Not rare on various rocks in the foothills; occurring throughout 



the Santa Cruz Peninsula in the maritime and foothill regions. Also 



recorded from the Oakland Hills and from near Santa Monica and 



Catalina Island. 



(brunonis, from the San Bruno Hills, San Mateo County, where it 

 was discovered by H. N. Bolander.) 



3. LECANIA DIMERA (Nyl.) Oliv. 



Lecanora dimera Nylander, Not. Sallsk. pro F. et F. Fenn. Forh. 1 1 : 



184, 1871. 

 Lecania dimera Olivier, Lich. 1'Ouest et Nord-Ouest France, 1 : 309. 



1897. 

 Lecanora athroocarpa Tuck. Syn. N. Am. Lich. I: 194. 1882, (in 



part). 



Thallus effuse, very thin or becoming slightly thicker and minutely 

 verrucose or areolate, but smooth to the naked eye; sometimes disap- 

 pearing; in our specimens marked by black hypothaUine lines; color 

 brownish ashen, grayish- white, or white; KOH yellow or yellowish; 

 CaCl 2 2 -. 



Apothecia small to very small, biatorine, plane or soon becoming 

 convex, the disk pale to dark brown or blackening, not pruinose; the 

 thin, entire thalline margin excluded when the convex black apothe- 

 cia are quite lecideine in appearance; epi thecium broad, dark bluish- 

 dusky or dusky- violaceous; paraphyses simple, free or more or less 



coherent, thread-like; asci narrowly clavate, /*; thecium deep 



45 5 



