A large number of wasps visit flowers for nectar. Probably few if any of these species serve as effective pollinators. Below are pictures of wasps collected from flowers in Everglades National Park (Miami-Dade and Monroe Counties, Florida). Many of these species might be found on flowers throughout Florida. There are no keys to wasps provided in these web site. A general entomology text should be used to identify species to family. Expert assistance will likely be needed for identification to the species level.
Mutillids
Scolids
Craboninae
Yellowjackets
Vespidae
Various taxa