Fink: LICHENS OF THE MINNESOTA VAI. I. KY. 287 



Physcia stellaris (L.) TUCK. var. apiola NYL., A. 



Physcia caesia (HOFFM.) NYL. 



Placodium elegans (LINK.) DC. 



Placodium murorum (HOFFM.) DC., A. 



Placodium cinnabarrinum (Aci-i.) Auz. 



Placodium cerinum (HEDW.) NAEG. and HEPP. var. sideritis 

 TUCK. 



Placodium vitellinum (EHRH.) NAEG. and HEPP. 



Lecanora rubina (VILL.) ACH. 



Lecanora rubina (VILL.) ACH. var. heteromorpha ACH. 



Lecanora muralis (SCHREB.) SCHAER., A. 



Lecanora muralis (SCHREB.) SCHAER. var. saxicola SCHAER. 



Lecanora frustulosa (DICKS.) MASS., A. 



Lecanora subfusca (L.) ACH. var. allophana ACH., A. 



Lecanora subfusca (L.) ACH. var. coilocarpa ACH., A. 



Lecanora hageni ACH., A. 



Lecanora cinerea (L.) SOMMERF. 



Lecanora calcarea (L.) SOMMERF. var. contorta FR., A. 



Lecanora xanthophana NYL. 



Lecanora cervina (PERS.) NYL. var. cinereoalba var. nov., A. 



Lecanora fuscata (SCHRAD.) TH. FR., A. 



Rinodina oreina (Acn.) MASS. 



Rinodina sophodes (Acn.) NYL., A. 



Rinodina lecanorina MASS., A. 



Urceolaria actinostoma PERS., A. 



Biatora rufonigra TUCK., A. 



Buellia spuria (SCHAER.) ARN. 



Buellia pullata TUCK. 



Buellia petraea (FLOT., KOERB.) TUCK. 



Endocarpon miniatum (L.) SCHAER., var. complicatum 

 SCHAER. 



Comparing this lichen formation with the similar ones of the 

 Sioux quartzite and the pipestone, we find it to contain all 

 lichens found on the two except Physcia tribacia (Ach.) Tuck, 

 and to contain fourteen not found on them, which I have marked 

 as additions (A). The absence of the one species from the 

 Granite Falls formation is doubtless an accident in plant distri- 



