Twinleaf
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Ranunculales
- family: Berberidaceae
- genus: Jeffersonia
- species: Jeffersonia diphylla
Bergshamra- Djursholm
Stockholm- Göteborg
Västra Götaland
Sweden
Huntsville
Alabama- Brookfield
- La Grange Park
- North Riverside
- Riverside
Illinois- Brookmont
- Cabin John
Maryland- Manhattan
New York- Washington, D. C.
Washington, D.C.- Kenosha
Wisconsin
United States