THE LICHEN FLORA OF THE SANTA CRUZ PENINSULA IQI 



for microscopic examination. Tuckerman's description is quite un- 

 satisfactory, but this plant seems to be sufficiently distinct from 

 massata. 



XLVIL CANDELARIELLA Mull. Arg. 



Candelariella Mull. Arg., 



Candelariella A. Zahlbr. Ascolichenes, 207. 1907. 



Thallus crustaceous, granular, warty, areolate, or marginally 

 lobed, bright yellow or golden; no red reaction with KOH. 



Apothecia sessile, circular, lecanorine, yellow, no red reaction with 

 KOH; paraphyses free, simple, septate or not, sometimes with the 

 tip branched; asci with 8 to many spores; spores colorless, elongate to 

 ellipsoid, simple or bilocular. Spermogonia very small, yellow; 

 sterigmata exobasidial, sparingly septate, sometimes forked or 

 branched; spermatia short, straight, more or less dumb-bell shaped. 

 Species few, on wood, bark, and stone. 



This genus seems to be close to Caloplaca, and is considered by 

 Zahlbruckner to be a reduced form of it, or else to represent the forms 

 from which Caloplaca originated. 



i. 



CANDELARIELLA VITELLINA (Ehrh.) Mull. Arg. 



Lichen mtellinus Ehrh. Exs. no. 155. 1785. 



Candelariella vitellina Mull. Arg. 



Placodium mtellinum Tuck. Syn. N. Am. Lich. I: 180. 1882. 



Thallus effuse, more or less scattered, of small, rounded, crenate 

 squamules or granules; these scattered and evanescent, or more often 

 crowded into rounded or globose heaps; from pale yellow to bright 

 greenish yellow. 



Apothecia numerous, circular, small to medium, sessile; usually 

 clustered and often four-sided or angular from being crowded; the 

 disk flat, finally convex when the thalline margin is excluded; margin 

 entire, becoming granulate or crenate; color yellow to tawny or even 

 brown; thecium blue with I; spores simple or falsely bilocular, 12-32 



in the asci, _ j". Occasionally the asci have but 8 spores, 



when it forms the species epixantha of authors, which however I am 

 unable to separate except as a variety. 



