Cardamine angustata (known by the common name slender toothwort) is a perennial forb native to the eastern United States,[4] that produces white to pink or purple flowers in early spring.

[5] Cardamine angustata was first described as Dentaria heterophylla by the English botanist Thomas Nuttall in 1818.

[8][9] However, in 1903 the German botanist Otto Eugen Schulz declared the name Cardamine heterophylla (Nutt.)

To correct the error, Schulz proposed the specific epithet angustata in lieu of heterophylla.

It has been recorded in Alabama, Arkansas, Washington, D.C., Delaware, Georgia, Indiana, Kentucky, Maryland, Mississippi, North Carolina, New Jersey, Ohio, Oklahoma, Pennsylvania, South Carolina, Tennessee, Virginia, and West Virginia.