Noctua janthe, the lesser broad-bordered yellow underwing, is a moth of the family Noctuoidea.

The ground colour of the forewings varies from bright ochre to gray to brown, often with a reddish or light purple tint.

This species can only be separated from Noctua janthina by examination of the genitalia.

[1] [2]See Townsend et al.[3] The moth flies in one generation from late June to September.

[1] The larvae feed on various deciduous trees, shrubs and herbaceous plants.