Lecanora rupicola ID: 0000 0000 0608 0913 [detail] © 2008 Judy Robertson

Niebla cephalota ID: 0000 0000 0608 0914 [detail] © 2008 Judy Robertson

Pertusaria californica ID: 0000 0000 0608 0915 [detail] © 2008 Judy Robertson

Thelomma occidentale on fence post ID: 0000 0000 0608 0912 [detail] © 2008 Judy Robertson

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos.