man-of-the-earth
Noun
Meaning
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
Source: WordNetSynonyms
manroot
Ipomoea fastigiata
Ipomoea panurata
scammonyroot
Ipomoea leptophylla
wild sweet potato vine
wild potato vine