250 FLORA OF MOUNT DESERT. 



DIVISION III. LICHENES. 



List contributed by Dr. John W. Eckfeldt, and based on col- 

 lections made by him, by Miss Mary L. Wilson, and by others. 

 Plants determined by Dr. Eckfeldt, Miss Wilson, and Miss Clara 

 E. Cummings. As all collections have hitherto been made either 

 within a short period of time, or under adverse circumstances, 

 doubtless a more thorough examination of the Island would 

 extend the list very greatly. In the case of Dr. Eckfeldt's 

 collections the names of the special stations have in most cases 

 unfortunately been lost. 



TRIBE I. PARMELIACEI. 

 USNEEI. 



EAMALINA, Ach. 

 R. calicaris (L.), Fries. 



On trees. (Eckfeldt) ; Seal Harbor (Wilson). 

 *Var. fraxinea, Fries. 



(Eckfeldt.) 

 Var. fastigiata, Fries. 



Seal Harbor (Wilson). 

 Var. canaliculata, Fries. 



(Eckfeldt); on fir trees, Seal Harbor (Wilson). 

 Var. farinacea, Schaer. 



(Eckfeldt); Seal Harbor (Wilson). 

 *R. intermedia, Delis. 



Thallus flat, attenuated and mostly divided, the margins fre- 

 quently sorediate. Apothecia pale yellow, terminal, subtended 

 by the elongated forked extremity of the 1 acini a. On shrubs and 

 branches (Eckfeldt). Frequently mistaken for the preceding 

 variety. 



R. pnsilla, Prev. 



On apple trees, Seal Harbor (Wilson). 



