dust lichen

Dust lichens are lichens in either the genus Chrysothrix or genus Lepraria.[http://plants.usda.gov/java/nameSearch USDA Natural Resources Conservation Service Name Search][http://eol.org/pages/16811/overview Dust Lichen (Chrysothrix), Encyclopedia of Life][http://eol.org/pages/36839/overview Dust Lichen (Lepraria), Encyclopedia of Life]Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, {{ISBN|978-0-300-19500-2}}{{rp|305}}