Fink : LICHENS OF THE MINNESOTA VALLEY. 303 



Physcia granulifera (Acn.) TUCK., G. 



Physcia pulverulenta (SCHREB.) NYL., G. 



Physcia stellaris (L.) TUCK., G. 



Physcia tribacia (Acn.) TUCK. 



Physcia obscura (EHRI-I.) NYL., G. 



Physcia adglutinata (FLOERK.) NYL. 



Collema pycnocarpum NYL., G. 



Collema flaccidum ACII. 



Leptogium myochroum (EHRH., SCHAER.) TUCK. 



Placodium aurantiacum (LIGHT.) NAEG. and HEPP., G. 



Placodium cerinum (HEDW.) NAEG. and HEPP., G. 



Lecanora subfusca (L.) Acn., G. 



Pertusaria pustulata (Acn.) NYL. 



Pertusaria leioplaca (Acn.) SCHAKR. 



Pertusaria velata (TURN.) NYL. 



Biatora rubella (EHRH.) RABENH. 



Biatora fuscorubella (HOFFM.) TUCK., G. 



Biatora subfusca FR., G. 



Lecidea enteroleuca FR., G. 



Buellia alboatra (HOFFM.) TH. FR., G. 



Buellia parasema (Acn.) TH. FR. 



Opegrapha varia (PERS.) FR., G. 



Graphis scripta (L.) ACH., G. 



Graphis scripta (L.) ACH. var. limitata ACH., G. 



Arthonia lecideella NYL. 



Arthonia radiata (PERS.) TH. FR., G. 



Coniocybe pallida (PERS.) FR. 



Pyrenula gemmata (Acn.) NAEG., G. 



Pyrenula hyalospora NYL., G. 



Pyrenula nitida ACH. 



Pyrenula quinqueseptata (NYL.) TUCK. 



Pyrenula leucoplaca (WALLR.) KBR., G. 



Pyrenula megalospora sp. nov., G. 



In order to avoid reproducing a large portion of the above 

 long list of names, I have for the similar formation at Granite 

 Falls marked those of the list found there (G) and add below the 



