Niebla and Vermilacinia (Ramalinaceae) from California and Baja California.  
Spjut, R.W., 1996. ISSN 0833-1475, 208 pp.  
Sida, Botanical Miscellany 14. Botanical Research Institute of Texas, Inc.

Mesa Camacho,
Spjut 11263, Apr 1990

Vizcaíno Peninsula,
Sierra Hornitos,
 Spjut 9691, May 1986

Mesa Camacho,
Spjut 11282, Apr 1990