264 FLORA OF MOUNT DESERT. 



* Var. confragosa, Nyl. 

 On rocks. (Eckfeldt.) 



*R. constans (Nyl.)j Tuck. 

 On old trees. (Eckfeldt.) 



PERTUSARIA, DC. 



P. velata (Turn.), Nyl. 



On trees and rocks. (Eckfeldt); — Seal Harbor (Redfield). 



* P. leioplaca (Ach. ), Schaer. 



On trees and rocks. (Eckfeldt.) 



* P. pustulata (Ach.), Nyl. 



On trees. (Eckfeldt.) 



CONOTREMA, Tuck. 



C. urceolatum (Ach.), Tuck. 



On trees. Seal Harbor (Wilson). 



GYALECTA, Ach. 



* G. lutea (Dicks.), Tuck. 



On bark of trees. (Eckfeldt.) 



* 6. Pineti (Schrad.), Tuck. 



On bark of trees. (Eckfeldt.) 



URCEOLARIA, Ach. 



* U. scruposa (L.), Xyl. 



On rocks and earth. (Eckfeldt.) 



THELOTREMA, Ach. 



* T. lepadinum, Ach. 



On tree trunks. (Eckfeldt.) 



