), Viola pratincola Greene, Viola retusa Greene ) is an annual or perennial forb in the Violet family (Violaceae) native to North America.

[1][2] Viola nephrophylla was named by Edward Lee Greene in 1896 from specimens he collected near Montrose, Colorado.

The species name, nephrophylla, is from the Greek for "kidney shaped leaves".

[3] Its habitats include moist meadows and open woods.

[2] It is listed endangered in Massachusetts, New York, and Ohio, as threatened in New Hampshire,[4] and as a special concern in Connecticut.