I02 NEW YORK STATE MUSEUM 



PARMELIACEAE 



Theloschistes polycarpus {Ehrh.) Tuckm. 



Trees. Lake Placid. Atkinson. Bark of maple. Shore of Mirror 

 lake. 



Theloschistes parietinus (Z.) Norm. 



Trunks and branches of trees. Not common. Branches of a thorn 

 tree near Mountain View house. 



Parmelia perlata {L.) Ach. 

 Rocks and sometimes on trees. Near Lake Placid. Atkinson. Old 

 Keene road. ^ 



Parmelia tiliacea {Hoffm.) Floerk. 



Trees and shrubs. Very common. 



Parmelia saxatilis (Z.) Fr. 

 Trees and rocks. Near Mountain View house and in Indian pass. 



Parmelia physodes (Z;.) Ach. 



Trunks and branches of trees. Very common. Specially abundant 

 on spruce and balsam fir. 



P. physodes vittata Ach. 

 Habitat same as that of the species but less plentiful. 



Parmelia pertusa {Schrank) Schaer. 



With the preceding and resembling it but much less common. It 

 may be distinguished from it by the small round perforations in the 

 thallus. It is sterile with us. , 



Parmelia olivacea (Z.) Ach. 

 Trees and shrubs. Common. 



P. olivacea aspidota Ach. 

 Trunks of alder, Alniis incana Willd. Old Keene road. 



Parmelia caperata (Z.) Ach. 

 Trees and rarely on rocks. Common but sterile. 



