THE IICHEN FLORA OF THE SANTA CRUZ PENINSULA 233 



Not common ; on bark of pepper (Schinus molle) and cypress trees, 

 at Mayfield. 



I also refer here a depauperate plant growing on various maritime 



shrubs at Santa Cruz; the spores of this are a '- /^. 



^ 8.5-12.25 



Occurring over Europe and North America, more often on mortar 



or rocks, rarely on old trees. 



8. CALOPLACA BOLACINUM (Tuck.) Herre. 



Placodiiim holacinum Tuckerman, Lich. Calif. 18. 1866. 

 Placodium holacinum Tuck. Syn. N. Am. Lich. I: 173. 1882. 



Thallus of rounded, turgid, crenate squamules, or centrally of 

 warty areoles; often contiguous but usually scattered, when the 

 scales are sometimes much reduced; color a pale yellow to tawny yel- 

 low. 



Apothecia medium to large, sessile, becoming convex; often cre- 

 nate or difform; the disk bright to dark orange, finely granulate; 

 proper margin pale, often prominent; thalline margin becoming 

 obsolete; thecium purplish red with KOH; blue with I; spores 



ellipsoid, ^"^'^^ li. 

 ^ ' 9.75 - 17 



On rocks; perhaps occurring throughout our range, but not often 

 seen outside the maritime belt, where it occurs on cliffs above the 

 sea; nowhere very abundant. 



A Calif ornian lichen. 



9. CALOPLACA CINNABARINA (Ach.) A. Zahlbr. 



Lecanora cinnaharina Ach. Lich. Univ. 402. 1810; Island of St. 



Bartholomew, West Indies. 

 Caloplaca cinnaharina A. Zahlbr. Ascolichenes, 228. 1907. 

 Placodium cinnaharrinum Tuck. Syn. N. Am. Lich. I: 173. 1882. 



Thallus areolate, fissured or chinky, or the areoles more often 

 scattered and minute or almost disappearing; sometimes large and 

 passing into flattened and crenate scales ; on a black hypothallus ; color 

 of thallus, orange-red. 



Apothecia very small or minute, appressed; disk plane to moder- 

 ately convex, orange-red; margin pale, entire; spores P- 



