118 BIOLOGICAL SOCIETY OF WASHINGTON. 



Jungermania Schraderi, Mart. 



Scapania albicans, Mitt. : var. taxifolia, Undwi, 



" nemorosa, Nees. 



" . compacta, Dumort; var. irigua, Undw. 

 Plagiocheila asplenioides, Nees & Mont. 

 " spinulosa, Nees & Mont. 



III. A LIST OF THE LICHENS OF WASHINGTON AND 

 VICINITY. 



By Rev. E. LEHNERT. 



[This great desideratum, a list of our Lichens, is at last supplied, through the indefatigable 

 labors of Mr. Lehnert, who has also placed it at my disposal. 



In a prefatory note accompanying the list, Mr. Lehnert says : " So far as known, the 

 Lichens of the District comprise 251 species, with 89 varieties, a total of 340 forms. In the 

 main our species are not as showy as those from the North or South, but have, when com 

 pared with the same species from these localities, a dwarfed and depauperate aspect, caused, 

 possibly, by the dryness of our climate, as we have very warm summers and cold winters"]. 



(According to Tuckerman's Genera Lichuuum Emend). 



A. GYMNOCARPI. 

 Trifo. 1. Parmeliacef. 



Fam. 1. USNEEI. 



Ramalina rigida, Pers. 

 " calicaris, Fr. 



" " var. fraxinea, Fr. 



" " " farinacea, Scluer. 



" fastigiata, Fr. 



" " " canaliculata, Fr. 



Cetraria Fahlunensis, Schaer. 



juniperina, Ach. 

 " aleurites, Fr. 



" " var. placorodia, Tuck. 



Fendleri, Tuck, 

 lacunosa, Ach. 

 ciliaris, Ach. 

 saepincola, Ach. 

 " Oakesiana, Tuck. 

 Evernia furfuracea, Mann. 



