Slender Three-Seeded Mercury

Panhandle

Bay, Escambia, Franklin, Gadsden, Gulf, Holmes, Jackson, Jefferson, Leon, Liberty, Okaloosa, Santa Rosa, Wakulla, Walton, Washington

North

Alachua, Bradford, Clay, Columbia, Duval, Flagler, Gilchrist, Hamilton, Lafayette, Levy, Madison, Marion, Nassau, Putnam, St. Johns, Suwannee

Central

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

South

Broward, Charlotte, Collier, Glades, Lee, Martin, Miami-Dade, Palm Beach

55 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.