Abstract: This checklist is part of the Flora of the Sonoran Desert Network Project, a project of the Vegetation Mapping program at the Sonoran Desert Network (http://science.nature.nps.gov/im/units/sodn/index.cfm). It has been derived from baseline inventory data, herbarium records, the phylogenetic and ecological literature, and agency study records. The Western National Parks Association awarded $7,500 in 2012 for a comprehensive study of the Monument's vascular and non-vascular flora. This project is a collaboration between the Flora Project and Western New Mexico University. It will involve researchers from WNMU, the University of Arizona, and the University of Kansas.