THE LICHEN FLORA OF THE SANTA CRUZ PENINSULA 187 



depressed centrally; pale brownish yellow to reddish, naked; red or 

 reddish with CaCl 2 2 ; margin thick, entire, becoming flexed or even 



20 30 

 lobate; spores ellipsoid, oblongo-ellipsoid, Q _^ V- or sub-globose, 



IL\ 8, 6, 4, or even but 2 in the asci. 

 42 



Abundant on trunks of trees and on shrubs in the foothills and 

 mountains, in both forests and chaparral; also found on the roof of a 

 house in Mayfield. 



I include here the "common bark lichen of the Pacific Coast" 

 given by Tuckerman under L. pallescens (see synonymy above). 



A lichen of frequent occurrence in the temperate and sub-arctic 

 realms. 



2. OCHROLECHIA UPSALIENSIS (L.) 

 Lichen upsaliensis Linne, Sp. PI. 1142. 1753. 



Thallus sub-orbiculate and determinate, or effuse; thin and smooth 

 to thickish and tuberculate, bluish white or yellowish white; KOH ; 

 CaCl 2 2 -. 



Apothecia usually small, eventually of medium size, numerous; 

 when young deeply concave, finally plane, the disk pale yellow and 

 granulose; margin thick, prominent, entire; spores 4 to 8 in the asci, 

 2 5~35 

 40-55 



Encrusting mosses and on sandstone among mosses at Devils 

 Canon, 2300 feet; Grizzly Peak, 2715 feet; and Castle Rock, 3000 

 feet. Also from Mt. Diablo, collected by Horace Mann, in Tuck. 

 Herbarium. A European lichen probably occurring throughout 

 Western North America in alpine situations. 



XLV. Lecania (Mass.) A. Zahlbr. 



Lecania Massalongo, Ale. Gen. Lich. Nuov. Limit, e Descr. 12. 



1853- 

 Lecania A. Zahlbruckner, Ascolichenes, 204. 1907. 



Thallus varying from uniform crustaceous to marginally lobate or 



squamulose forms, or even dwarfed fruticose; alga Pleurococcus . 



Apothecia circular, sessile, lecanorine, a proper margin lacking or 



Proc. Wash. Acad. Sci., May, 1910. 



