Seaside alder
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Fagales
- family: Betulaceae
- genus: Alnus
- species: Alnus maritima
Milford- Milton
- Wilmington
Delaware- Euharlee
Georgia- Salisbury
Maryland- Tishomingo
Oklahoma- Rockdale
Texas- Washington, D. C.
Washington, D.C.
United States