Floating Marsh Pennywort

Panhandle

Bay, Escambia, Franklin, Gadsden, Jefferson, Leon, Liberty, Santa Rosa, Wakulla, Walton

North

Alachua, Clay, Columbia, Duval, Flagler, Levy, Marion, Nassau, Putnam, St. Johns, Suwannee, Union

Central

Brevard, Citrus, DeSoto, Hernando, Highlands, Hillsborough, Indian River, Lake, Manatee, Okeechobee, Orange, Osceola, Pasco, Pinellas, Polk, St. Lucie, Sarasota, Seminole, Sumter, Volusia

South

Collier, Glades, Lee, Martin, Palm Beach

47 of 67 counties, from research-grade iNaturalist observations. They show where people have photographed it, not every place it grows — absence here isn't proof it's absent.