Search criteria: scientific name = Porpidia crustulata

Click on the photo to see a full-sized version and 
to access details about the photo.
Photo © by  Jim Riley
Porpidia crustulata
Common polka dot
Click on the photo to see a full-sized version and 
to access details about the photo.
Photo © by  Jim Riley
Porpidia crustulata
Common polka dot