(noun) a morning glory with long roots of western United States. Synonyms: Ipomoea leptophylla.
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Noun Definition 1
(noun) tropical American prostrate or climbing herbaceous perennial having an enormous starchy root; sometimes held to be source of the sweet potato. Synonyms: wild potato vine, wild sweet potato vine, manroot, scammonyroot, Ipomoea panurata, Ipomoea fastigiata.