Polychrysia esmeralda, the delphinium leaftier (from Ancient Greek πολύς [polus] = "many", and χρυσός [khrusos] = "gold"), is a moth of the family Noctuidae.

[1] It is found in Asia (eastern Siberia) and in North America (Alaska, British Columbia, Alberta, Saskatchewan, and Manitoba).

Adults are reported to feed on the nectar of fireweed (Chamerion species).

When the larva is fully grown it ties leaves together with silk, and within spins a gold-colored cocoon.

Adults look similar to Polychrysia moneta, but the upperside of the wings is paler in P. moneta, and the "curved extrabasal line, below the median vein of the forewings", is simple in P. esmeralda and double in P.