118 BIOLOGICAL SOCIETY OF WASHINGTON. 



Jungermania Schraderi, Mart. 



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



" nemorosa, Nees. 



" compacta, Duniort; Mir. 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 Lichenum Emend). 



A. GYMNOCARPI. 

 I rib. 1. Parmeliacei. 



Fam. 1. USNEEI. 



Ramalina rigida, Pers. 



" calicaris, Fr. 



" " var. fraxinea, Fr. 



" " " farinacea, Scluer. 



" " fastigiata, Fr. 



" " " canaliculata, Fr. 



Cetraria Fahlunensis, Schrer. 



" juniperina, Ach. 



" aleurites, Fr. 



'■ " var. placorodia, Tuck. 



" Fendleri. Tuck. 



" lacunosa, Ach. 



" ciliaris, Ach. 



" saepincola, Ach. 



" Oakesiana, Tuck. 



Evernia furfuracea, Mann. 



