Lace Lichen (image) University of California - Davis Share Print E-Mail Caption Lace lichen, or Ramalina menziesii, is California's state lichen. These drape across blue oaks in Napa County, which is outside the study area. Credit Jesse Miller/UC Davis Usage Restrictions Provide credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.