When you see this rock in the meadow with a bright, almost florescent yellow dusting, you couldn't be blamed for thinking that a vandal had come along with spray paint. There are a number of species of brightish yellow lichens that occur on rocks, but this one seems to fit Caloplaca citrina. C. citrina is found from Alaska to California and can be on a coastal rocks as well as dry land.
Two biologists on a beautiful property armed with cameras, smart phones and a marginal knowledge of websites took up the challenge of documenting one species a day on that property. Join along! Posts and photographs by Leah Ramsay and David Fraser (unless otherwise stated; started January 1, 2014.