Chlorissa viridata, the small grass emerald, is a moth of the family Geometridae.

Face red-brown, fillet white, crown light green.

Forewings light green; costal edge whitish - ochreous; first line faint, curved; second nearly straight, whitish; cilia white, basal half pale greenish.

Hindwings as forewings, but first line absent; termen very obtusely angulated.

Other recorded food plants include Empetrum nigrum, Myrica gale, Vaccinium uliginosum, Quercus, Potentilla, Galium, Hieracium, Artemisia, Ononis, Clematis, Prunus, Crataegus, Corylus, Rubus, Erica, Ulex, Genista, Lotus corniculatus, Crataegus and Ledum palustre.