*Ipomoea argentifolia A. Rich. ex Sagra, Hist. Fís. Cuba, Bot. 11: 131. 1850 *Ipomoea argentifolia A. Rich. ex Sagra, Hist. Fís. Cuba, Bot. 11: 131. 1850 sec. Hassler 2018=Exogonium argentifolium (A. Rich. ex Sagra) House in Bull. Torrey Bot. Club 35(3): 102. 1908 syn. sec. ???