l86 NEW YORK STATE MUSEUM 



LECANORACEAE 

 Placodium vitellinum {Ehrh.) N. &= H. 

 Rocks. Rare. Brewster farm. 



Lecanora pallida {Schreb.) Schaer. 

 Bark of trees on which it forms conspicuous whitish spots. Common. 



L. pallida cancrifortnis Tuckm. 

 Bark of elm. Ausable valley. 



L. pallida angulosa Hoffm. 



Bark of black cherry. H. Brown farm. 



f 



Lecanora subfusca (Z.) Ach. 



Trunks and branches of trees. A very common lichen. 



L. subfusca allophana Ach. 

 Dead spruce. Rocky hill. 



L. subfusca argentata Ach. 

 Vicinity of Lake Placid. Atkinson. 



Lecanora varia {Ehrh.) Nyl. 

 Trees and dead wood. Vicinity of Lake Placid. Atkinson. 



L. varia symmicta Ach. 

 With the last. Atkinson. 



Lecanora atra {Huds.) Ach. 

 Trunks of beech trees. Freemans Home. 



Lecanora elatine Ach. 



Bark of coniferous trees. Swamp east of Wood farm and Indian pass 



trail. 



L. elatine ochrophaea Tuckm. 



Trunks of balsam fir and spruce. Wood farm. 



Lecanora pallescens {L.) Schaer. 

 Trees and rocks. Common. 



Pertusaria communis DC. 

 Trees and rocks. Common. 



