In the eastern portion of the range, some populations with ochreous to dark ochreous color, a light subtornal patch and sometimes a slight costal patch near the apex. Hindwings darker, gray. Comparison with similar species This yellow, uniformly colored species should be unmistakable. It often coexists with the yellow but spotted G. piperella and the uniformly colored, darker brownish G. politella . Females oviposit into the floral ovary of the host, and several larvae per capsule complete the first one or two larval instars feeding on seeds.
Subsequent biology is unknown.
Greya enchrysa ovipositing into the ovary of a H.cylindrica flower. In open, grassy pine forest or near rockfaces in open country where the host is found growing in crevices and ledges. Elevational range 250-1500 m. It often coexists with G. piperella and G. politella. Ecological notes Greya enchrysa is an efficient passive pollinator during oviposition, transporting ample pollen of its host on the abdomen between flowers.