WHAT FLORIDA NATIVE PLANT IS BLOOMING TODAY?: FOURPETAL ST.JOHN’S-WORT (Hypericum tetrapetalum)
One of the many Hypericum that are native to Florida. The one commonly used in over-the-counter supplements is an exotic species.
Native American Ethnobotany for this genus: http://naeb.brit.org/uses/search/?string=Hypericum
Where does it grow in Florida? http://www.florida.plantatlas.usf.edu/Plant.aspx?id=654