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 SE of Puerta Catarina, Spjut & Marin 13108, Apr 1994, holotype

Mesa SE of Puerta Catarina, Spjut & Marin 13108, Apr 1994, holotype

Mesa SE of Puerta Catarina, Spjut & Marin 13403, Apr 1994