Atlas of Florida Vascular Plants

Florida, with over 4,100 species of native or naturalized ferns and seed plants, is the third most floristically diverse state in the United States.

The Atlas of Florida Vascular Plants provides a source of information for the distribution of plants within the state. It also serves as a resource for the the Guide to Vascular Plants of Florida (Wunderlin, 1998; Wunderlin and Hansen, 2003) and for various regional floras, such as Clewell (1985), Long and Lakela (1971), and Wunderlin (1982).

The final word on a plant's indigenous status in Florida. I've used it several times to identify a roadside plant.