22O HERRE 



range is thus at least 1000 miles from north to south and may be 



much greater. 



(Named for Archibald Menzies, Scotch botanist and explorer, who 



collected the plant, probably at Monterey, sometime before 1800 



and who gave Tuckerman his first specimens.) 



7. RAMALINA FARINACEA (L.) Ach. 



Lichen farinaceus Lirme, Sp. Plant. 2: 1146. 1753. 



Ra malina farinaceus Ach. Lich. Univ. 606. 1810. 



Ramalina farinaceus Herre, Proc. Wash. Acad. Sci. 7: 335. 1906. 



Ramalina calicaris d. farinacea Tuck. Syn. N. Am. Lich. I: 25. 



1882. 



Thallus tufted, erect or pendulous, compressed and two-edged, or 

 attenuate and thread-like, channelled; color pale green to white or 

 nearly white; lateral white powdery soredia very abundant on lobes. 



Apothecia lateral, rare and inconspicuous, concolorous; spores 



4 5 

 curved, bilocular, - - /<. 



i3 ~ i5 



Distribution well nigh cosmopolitan, occurring with us in the foot- 

 hills and mountains, on trees and shrubs. A few fruiting specimens 

 were obtained in the mountains above Searsville, altitude 1500 feet, 

 growing upon oaks. This plant is likely to be confused with Evernia 

 prunastri, with which it is commonly associated. 



In deep, dark canons the thallus often darkens and is now and 

 then of a pure black, only recognizable because of the intermediate 

 forms between the typical plant and the nigricant variety. 



8. RAMALINA CANALICULATA Fr. 



Ramalina canaliculata E. Fries, Lich. Eur. 30. 1831. 

 Ramalina calicaris c. canaliculata Tuck. Syn. N. Am. Lich. I: 25. 

 1882. 



Thallus tufted, elongate, rather rigid, erect or sub-pendulous; 

 lobes slender, irregularly branched, channelled and more or less 

 reticulate beneath; not sorediate; color pale gray-green or glaucous. 



Apothecia abundant, marginal or terminal, sub-pedicellate, small 

 or medium size, concolorous; spores straight or slightly curved, 



sometimes falsely tri- or quadri-locular, ' I*. 



10 - 17.25 



