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  • Helianthus giganteus (category Helianthus)
    hybrid of H. giganteus with H. grosseserratus has been called H. luxurians E. Watson (R. W. Long 1954). Hybrids of H. giganteus with H. divaricatus have been
    4 KB (378 words) - 21:12, 5 November 2020