man-of-the-earth

n.	1.	(Bot.) A long-rooted morning glory (Ipomoea leptophylla) of Western U. S.
	2.	A tropical American prostrate or climbing herbaceous perennial (Ipomoea panurata or Ipomoea fastigiata) having an enormous starchy root; sometimes held to be source of the sweet potato.

Thesaurus

Noun	1.	man-of-the-earth - a morning glory with long roots of western United States Ipomoea leptophylla morning glory - any of various twining vines having funnel-shaped flowers that close late in the day
	2.	man-of-the-earth - tropical American prostrate or climbing herbaceous perennial having an enormous starchy root; sometimes held to be source of the sweet potato Ipomoea fastigiata, Ipomoea panurata, manroot, scammonyroot, wild potato vine, wild sweet potato vine morning glory - any of various twining vines having funnel-shaped flowers that close late in the day