2l8 HERRE 



Apothecia abundant, marginal or sub-terminal; concolorous or 

 decidedly yellowish; spores straight or slightly curved, bilocular, 



3.6 - 4.2 



- fj.. 



9-7 - 14-5 



This singular looking Ramalina occurs on maritime rocks all along 

 the coast of California wherever conditions are favorable. In places 

 it covers the rocks to such an extent that at some distance they 

 appear to be hidden from view by some kind of tufted grass. The 

 holdfast is very strong and often brings a layer of rock away with it. 

 It contains a remarkable amount of orange-red coloring matter and 

 no doubt would furnish a satisfactory orchil. 



I have examined specimens collected at various points along the 

 coast, from San Francisco to Guadalupe Island, Lower California. 



5. RAMALINA RETICULATA (Noehd.) Krempelh. 



Lichen reticulata Noehden in Schrad. Journ. Bot. 3 : 237-238. 1801. 

 Ramalina reticulata Krempelhuber, Geschicht. u. Litt. d. Lich. 1 : 



86. 1867. 



Ramalina reticulata Tuck. Syn. N. Am. Lich. I: 22. 1882. 

 Ramalina reticulata Herre, Proc. Wash. Acad. Sci. 7: 333. 1906. 



Thallus much compressed, greatly elongated, pendulous; very 

 much branched, forming tangled mats; the whole plant filled with 

 holes, the result being a more or less coarse or delicate net- work; 

 the branches giving off many lobules, also reticulated; color grayish 

 green, alike on both sides. 



Apothecia abundant, scattered over surface of plant, concolorous; 



4i 4.8 



spores ellipsoid or oblong, straight or curved, bilocular, - /*. 



10.8- 15.75 



Recorded from Lower California to British Columbia, and occur- 

 ring throughout our territory; reaching its highest development in 

 the lower foothills near the Bay and the ocean shores. It is common 

 on trees and old fences. 



In deep, dark, humid canons, or at great elevations where influ- 

 enced by the ocean fogs and winds, the thallus is exceedingly delicate 

 and filmy, resembling the finest lace. In the dry lowlands it is often 

 very coarse, the broad, unperforated expansions of the thallus reach- 

 ing a breadth of 40 mm. or more. It sometimes reaches a length of 



