Cucullia xeranthemi is a species of moth of the family Noctuidae.

In the east, it is found from Lower Austria and Hungary to southern Russia and western Siberia.

Forewing whitish or bluish grey, with dark fuscous suffusion along the course of the lines, especially at costa; stigmata with pale brown centres and whitish grey annuli, the orbicular 8-shaped, the reniform less defined; inner line double, strongly dentate; outer line variable, sometimes distinct throughout, at others only above inner margin, always preceded on submedian fold by a blackish cloud, and followed by a black streak below vein 2; hindwing dingy whitish, the veins dark, the terminal area smoky black.

Larva, when full fed, violet with paler, ill-defined, longitudinal streaks; lateral lines white.

Adults are on wing from May to August in two generations per year.