This is a sedge. Most Rhynchospora species are wind pollinated. The white bracts of this species attract insects. Can use as a groundcover in moist sites. Good in an informal savanna setting, rain garden or bioswale.

According to Kew Gardens, it is from Central America and probably Cuba and Florida.   After going through the photos and labels for specimens in the SIEnet database, the only occurrences in Florida that were convincingly in natural systems (as opposed to highly disturbed areas) were on shell mounds, dunes, and similar coastal areas.  Hence, the range map provided highlights the counties along the west coast that have these. Noted as invasive  and weedy on many herbarium specimen labels.  Where not native, we should think of it as invasive.