Photo 9147179, (c) Nova Patch, some rights reserved (CC BY-SA), uploaded by Nova Patch

Attribution © Nova Patch some rights reserved Uploaded by novapatch Source iNaturalist Associated observations Photos / Sounds 2 photos What Sulphur Firedot (Gyalolechia flavovirescens) Observer novapatch Date June 18, 2017 04:45 PM EDT Place C&O Canal National Historical Park, Cabin John, MD, US (Google, OSM) Date Added July 18, 2017 11:09 PM EDT Description Crustose thallus growing on masonry of C&O Canal Lock 8. 3 IDs Research Grade View Sizes small medium large original