The vegetation and flora of the mainland portion of Sleeping Bear Dunes National Lakeshore was surveyed during the summers of 1984 and 1985 in scope similar to that of a previous study of the Manitou Islands. The vegetation associations were mapped and described, and a catalogue of 704 vascular plant species compiled. Ten permanent plots were established within the study area to observe any future vegetation changes at selected sites. The mainland distributions of nine native species listed as threatened or of special concern by the State of Michigan were noted and fragile habitats identified. An investigation of the habitat, frequency, and distribution of the Sleeping Bear Dunewort, a potentially new species of Botrychium discovered on the area’s perched dunes, was made. Recommendations concerning the resource management of the mainland were proposed.