Helianthus sarmentosus is a species of sunflower in the family Asteraceae. It is native to French Guiana, part of the French Republic.Richard, Louis Claude Marie 1792. Actes de la Société d'Histoire Naturelle de Paris 1(1): 112 diagnosis in LatinCassini, Alexandre Henri Gabriel de 1823. Dictionnaire des Sciences Naturelles [Second edition] 29: 492 in French, as Chylodia sarmentosa
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