Blue toadflax

Prepared by Jennifer L. D’Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. March 2011.

Scientific name: Nuttallanthus canadensis (L.) D.A. Sutton

Common name(s): blue toadflax, Canada toadflax, old-field toadflax

Links: USDA PLANTS Profile , NPIN Profile, Go Botany

Images: (to see enlargements [PC]: click on image, then right click and choose “view image”)



-leaves are simple and entire

-opposite and alternate leaves

-flowers are light blue-white

-blooms May-July


-disturbed areas

-sandy soils

-meadows and fields



Go Botany. “Nuttallanthus Canadensis (L.) D.A. Sutton.” Nuttallanthus Canadensis (Oldfield-Toadflax): Go Botany, 2020,

Wisconsin State Herbarium. “ Nuttallanthus Canadensis (L.) D.A.Sutton.” Online Virtual Flora of Wisconsin – Nuttallanthus Canadensis,