helianthus giganteus helianthus annuus • helianthus laetiflorus · · · Info · Definitions · Synonyms · Characters · · helianthus giganteus · · Text Common · · Latin · · Scripts 20 · · Length 8 · · Syllables Definitions · · · (noun) very tall American perennial of central and the eastern United States to Canada having edible tuberous roots. Synonyms: giant sunflower, tall sunflower, Indian potato, Helianthus giganteus. · · Noun Definition 1 Synonyms · · · giant sunflower · · Synonym 1 tall sunflower · · Synonym 2 indian potato · · Synonym 3 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075