Publicación: This checklist is based mainly upon the collections made by Gayle Marrs-Smith, which are housed at the Arizona State University Herbarium. These collections are referenced in her Master's Degree Thesis entitled "Vegetation and Flora of the San Bernardino Ranch, Cochise County, Arizona", which was submitted in December of 1983. Her collections have been supplemented by other vouchered specimens collected within the Refuge, including ongoing collections by the authors.
