366 HERRE 



erose ; sometimes minutely and excessively dissected and 

 crisped ; color black or very dark brown ; beneath naked, finely 

 granulate, dull black. Sterile. 



Not rare on the high sandstone cliffs at the head of Devils 

 Canon, at an altitude of 2300 feet, mingled with Gyt'ophora 

 diabolica. Apparently not occurring elsewhere in the peninsula. 

 Lichen polyp/iylliLs 'Lmn. Sp. PL 2: 1150. 1753. 

 Gy?'ophora -polyfJiylla Turn. & Borr. Lich. Brit. 214. 1839 



2. GYROPHORA PH^A (Tuck.). 



Thallus small to medium, one-leaved or occasionally poly- 

 phyllous, smooth above ; color brown, but varying from greenish 

 or grayish to olive or dark tawny brown ; under surface without 

 fibrils, granular: usually darker brown or blackish, but some- 

 times paler. Apothecia numerous, black ; at first innate but 

 finally prominent ; angular or rounded ; plicate ; spores simple, 

 colorless. 



On bare, exposed, sun-blistered rocks ; most frequently on 

 sandstone but also on igneous rocks. According to Tucker- 

 man found only between 1000 and 3000 feet altitude, but 

 really extending much above and below those limits. Occurring 

 from Searsville ridge, at an elevation of about 350 feet, to the 

 summit of Loma Prieta, 3788 feet. In the Mt. Hamilton Range 

 across the Santa Clara Valley from the Santa Cruz Mountains, 

 it occurs in Alum Rock Park near San Jose at about 200 feet 

 above sea level. Usually abundant wherever found. My 

 largest specimens have a diameter of somewhat more than two 

 inches. 

 Unibilicaria p/iceaTuck. Lich. Calif. 115. 1866; Tuck. Syn. 



N. Am. Lich. i : 86. 1882. 



3. GYROPHORA DIABOLICA Zahlbruckner, sp. nov. 

 Thallus small to medium, one-leaved becoming many-leaved 

 and complicate ; more or less orbicular, the edges torn or 

 irregular ; coriaceous, rigid, usually smooth and polished ; color 

 a very dark rich brown, becoming olive when moist ; beneath 

 black, granulate, more or less covered with short, dense, black 

 fibrils. Fertile plants infrequent ; apothecia at first innate and 



