Grass-Leaved Arrowhead

Panhandle

Escambia, Franklin, Gulf, Jefferson, Leon, Liberty, Okaloosa, Santa Rosa, Wakulla, Washington

North

Alachua, Baker, Clay, Columbia, Dixie, Duval, Flagler, Hamilton, Levy, Marion, Nassau, Putnam, St. Johns

Central

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

South

Charlotte, Collier, Glades, Hendry, Lee, Martin, Palm Beach

Keys

Monroe

50 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.