Photo 260296, (c) CALS, some rights reserved (CC BY-NC-ND), uploaded by CALS

Attribution © CALS some rights reserved Uploaded by cals Source iNaturalist Associated observations Photos / Sounds What Dust Lichens (Genus Lepraria) Observer cals Date February 16, 2013 Place Knowland Park, Oakland CA (Google, OSM) Date Added February 24, 2013 05:55 PM PST Description Found on old wood post. 1 ID View Sizes small medium large original