Yamp vs. Yams — What's the Difference?

An umbelliferous plant, Perideridia gairdneri, native to California, whose tubers were used as food by Native Americans.

Any of numerous chiefly tropical vines of the genus Dioscorea, many of which have edible tuberous roots.

An umbelliferous plant (Carum Gairdneri); also, its small fleshy roots, which are eaten by the Indians from Idaho to California.

The starchy root of any of these plants, used in the tropics as food.

See sweet potato.

Plural of yam