THE LICHEN FLORA OF THE SANTA CRUZ PENINSULA 69 



Apothecia numerous, rather large, slightly sunken, variously and 

 irregularly shaped, curved, wavy, often branching, much resembling 

 characters in Oriental script; disk broad, plane, brownish-black to 

 black, more or less pruinose; thalline margin white, mostly entire, 

 somewhat overhanging, seemingly burst out from below; proper 

 margin blackish brown, merging into the clear or very pale yellow 

 hypothecium; paraphyses not very abundant, slender, simple, free, 

 pale blue with I; asci elongate-clavate or sub-cylindrical; spores 

 brown, 8-celled or rarely 6-or y-celled; mature spores at first pale 

 brown, broadly ellipsoid or oblong, often pointed at one end, viola- 



ii i2j 

 ceous with I, the septa rather indistinct, o __ /*; later be- 



coming darker, thick-walled with heavy septa, caterpillar-like in 



A single specimen collected on Alnus, on the Gazos Creek, with 

 Opegrapha prosiliens. 



Widespread in the tropics; occurring also in Great Britain, 

 France, Germany, Japan, and temperate America. 



DIRINACEJE. 



Thallus uniform crustaceous, corticated; alga Trentepohlia. Apo- 

 thecia circular or elongate, with both proper and thalline margin; 

 hypothecium thick, black; spores spindle-shaped, 4 to 8-locular, 

 colorless or brown. 



XV. DirinaE. Fr. 



Dirina E. Fries, Syst. Orb. Veg. 244. 1825. 



Cortex of unseptate hyphae arranged perpendicularly to the cor- 

 tex. The proper margin thin, the thalline margin thick; paraphyses 

 simple, unbranched; spores 8, colorless. 



A genus of few species, on maritime rocks and on bark of trees near 

 the sea. 



i. DIRINA FRANCISCANA A. Zahlbr. 



Dirina franciscana A. Zahlbr., in Herre Botanical Gazette, 43: 270, 



1907. 



Thallus effuse, of thick, rounded, irregular tuberculate areoles, 

 uniform crustaceous, sub-cartilaginous, forming heaped patches. 



