yampah /ˈjæmpə/ noun1 •Any of the genus Perideridia of plants in the parsley family, native to western North America, with umbels of white flowers, especially Perideridia gairdneri, which has an edible root.At this place I became first acquainted with the yampah (anethum graveolens,) which I found our Snake woman engaged in digging in the low timbered bottom of the creek. — 1845 formsyampahs
