THE PLANTS OP THE PEIBILOF ISLANDS. 581 



Parmelia sazatilis, (L.) Ft. 



Common on rocks and earth ou both islands; frequently found abnormally colored 

 from red-brown to a beautiful violet. An isidiferous form on earth, St. George Island, 



Parmelia saxatilis, (L.), Fr., var. sulcata, Nyl. 

 On rocks, St. George Island. 



Parmelia physodes, Aoh., -var. vittata, Aoh. 

 On earth, St. Paul Island. 



trmbiUcaiia rugifera, Nyl. 



On rocks on both islands, l^os. 27 and 28. Ghloroalcio stratum corticale alterius 

 speeiminis rubescit, alterius non mutatur. 



Umbilicaria cylindrioa, (L.), Delis., Tar. delisoei, Deapa. 

 On rocks on both islands. 



Umbilicaria erosa, Aoh.' 



On rocks on both islands. 



Umbilicaria proboscidea, (L.), Stenh. 

 On rocks on both islands. 



Sticta linita, Ach. 



On damp rocks, St. Paul Island. 



Peltigera apthosa, (L.), Hoffm. 



On and in wide crevices of damp rocks on both islands. 



Peltigera canina, (L.), Hoffm. 



On moss on both islands. 

 Peltigera canina, (L.), var. spongiosa, Tuck. 



With the last, but not so common. 



Peltigera canina, Hoffm., var. spuria, Ach. 



In a dense tuft of moss which it divided, St. Paul Island. 



Solorina orocea, (L.), Ach. 



On earth and rocks, St. Paul Island, 



Pannaria brunnea, (Sw.), Mass. 



On earth and rocks, St. George Island. 



Placodium eleg^ns, (Link.), DC. 



Rare on rocks, St. Paul Island. 

 Leoanora ventosa, (L.), Ach. 



On rocks, St. George Island. 



Lecanora tartarea, (L.), Ach. 



Common and variable on rocks on both islands. 



Leoanora tartarea, Ach., var. frigida, (Sw.). 



Common on rocks, St. Paul Island. 

 Leoanora ooulata, (Dicks.), Ach. 



On rocks, St. Paul Island. 

 Leoanora ooulata, (Dicks.), Ach., var. gonatodes, Ach. 



On rocks, St. Paul Island. Grusta Leoanora tartariae, Icalio lutescit et chlorcalcio 

 rubescit. 



