Photo 61873748, (c) John Plischke, some rights reserved (CC BY-NC-SA), uploaded by John Plischke

Attribution © John Plischke some rights reserved Uploaded by johnplischke Source iNaturalist Associated observations Photos / Sounds 2 photos What Smooth Sunken Disc Lichen (Aspicilia laevata) Observer johnplischke Date April 29, 2018 Place Whipple Dam State Park, Pennsylvania, USA (Google, OSM) Date Added February 20, 2020 10:30 PM EST 2 IDs Research Grade View Sizes small medium large original