Blue toadflax
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Lamiales
- family: Plantaginaceae
- genus: Nuttallanthus
- species: Nuttallanthus canadensis
Guarapuava
Paraná
Brazil
Saint Andrews
New Brunswick- Shelburne
Nova Scotia- Farnham
Quebec
Canada
Taltal
Antofagasta
Chile
Catamayo
Loja
Ecuador
Lyons
Colorado- Georgetown
Delaware- Bourbonnais
- Bradley
- Manhattan
Illinois- Gary
- Notre Dame
- South Bend
Indiana- Calais
Maine- Arden on the Severn
- Bladensburg
- Brentwood
- Brooklyn Park
- Calverton
- Cheverly
- Chillum
- Colmar Manor
- Cottage City
- District Heights
- East Riverdale
- Edmonston
- Elkridge
- Herald Harbor
- Hillandale
- Hyattsville
- Jessup
- Langley Park
- Laurel
- Marlboro Meadows
- Morningside
- Riverdale Park
- Severna Park
- Silver Spring
- Suitland
- Takoma Park
- University Park
- Upper Marlboro
Maryland- Borough of Bronx
- Woodbury
New York- Newport
North Carolina- Washington, D. C.
Washington, D.C.
United States
Atiquipa