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A relatively small dark noctuid (wingspan approx. 2.7-3.0 cm). The median area of the forewing is black, with the basal area usually lighter black mixed with brown scales The reniform spot and most of the subterminal area beyond the postmedian line is contrasting light grey and white, with an incomplete dark terminal band and lightly checkered black and white fringe. The lower part of the pale terminal area is suffused with light rust or yellow orange scales, hence the common name. The hindwings are light grey-brown with a faint dark discal mark. Antennae in both sexes simple. Most likely to be mistaken for L. olivacea, which is smaller, has white scaling in the basal area, and at best has only a faint ochre tint in the lower subterminal area. Questionable specimens can be separated by the male valve, which is expands abruptly into the cucullus in olivacea, but tapers gradually in davena.

Davena is a western species, occurring east to the mountains of western Alberta. In Alberta it has been collected from just north of Nordegg (Brown Creek) south to Waterton. It occurs in open wooded area and adjacent meadows.