American water-willow
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Lamiales
- family: Acanthaceae
- genus: Justicia
- species: Justicia americana
- Canada
Northport
Riverside
Tuscaloosa
Alabama
Bourbonnais
Bradley
Manhattan
Wilmington
Illinois
Augusta
Kansas
Flat Rock
Michigan
Edmond
Oklahoma
Columbia
Wrightsville
Pennsylvania
Dover
Tennessee
Washington, D. C.
Washington, D.C.
United States
Charlemagne