The St. Johns River Water Management District's (SJRWMD) Division of Water Supply Management contracted with the Florida Natural Areas Inventory (FNAI) to conduct a survey for rare and endemic plant and rare land and riverine vertebrates and rare wetland communities associated with Silver Springs in Marion County. The survey focuses on collecting data on locations and distributions of rare and endemic species as well as rare wetland communities listed by FNAI. This information will be utilized by SJRWMD in setting Minimum Flow and Levels (MFL) which serves to protect all aquatic natural resources including rare and endemic species and their associated natural communities. This report contains brief descriptions of each of the rare endemic and non-endemic plants and rare land and riverine vertebrates, non-rare endemic plant species, and the rare natural communities that were documented. Included within each description of the plants and animals are specific characteristics of the species, information on related species, locations, and natural community designation. The rare natural community descriptions include information on plant associations and other distinguishing features. Attribute tables with detailed data on all of the rare species and non-rare endemic plant species, and natural community occurrences documented in association with Silver Springs are included in the appendices.