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.

Isla Guadalupe, Palmer s.n.,
collected in 1875, holotype (US)

     Niebla isidiosa was reported by Spjut (1996) only from the type collected by Palmer in 1875; however, Elix and McCarthy have since collected it on Isla Guadalupe (website, March 2005, with reference to J. A. Elix. & P. M. McCarthy, 1998: Catalogue of the lichens of the smaller Pacific Islands, Bibliotheca Lichenologica 70, 1 - 361).