To be eligible, a species must be recognized as native or naturalized in the continental United States, including Alaska but not Hawaii, as documented in Elbert L. Little Jr.'s Checklist of United States Trees (Native and Naturalized), published in 1979 as Agricultural Handbook 541 by the United States Department of Agriculture.
Several of the trees at Pettigrew State Park are listed on the North Carolina and National Registries of Big Trees.
National Football League | National Register of Historic Places | National Hockey League | England national football team | National Basketball Association | National Science Foundation | National Geographic | National Trust | National Endowment for the Arts | National Geographic Society | Argentina national football team | National Trust for Places of Historic Interest or Natural Beauty | National Park Service | National League | Australian National University | National Guard | National Geographic Channel | National Institutes of Health | Big Finish Productions | National Guard of the United States | National Collegiate Athletic Association | United States National Research Council | National Portrait Gallery | National Academy of Sciences | Indian National Congress | United States men's national soccer team | National Research Council | Royal National Theatre | National Gallery of Art | Mexico national football team |