WHAT FLORIDA NATIVE PLANT IS BLOOMING TODAY?: NARROWLEAF BLUE-EYED GRASS (Sisyrinchium angustifolium)
This spring bloomer is a member of the iris family that likes it moist to wet. Dainty flowers close evening into night so you must enjoy it earlier in the day.
Native American Ethnobotany for this genus: http://herb.umd.umich.edu/herb/search.pl?searchstring=Sisyrinchium+angustifolium