man-of-the-earth

Noun

• tropical American prostrate or climbing herbaceous perennial having an enormous starchy root; sometimes held to be source of the sweet potato

• a morning glory with long roots of western United States

Related words

• Synonyms: 
  wild potato vine , wild sweet potato vine , manroot , scammonyroot , Ipomoea panurata , Ipomoea fastigiata , Ipomoea leptophylla