AUSTIN, DANIEL F. (Dept. Biol. Sci., Florida Atlantic Uniiv., Boca Raton, Florida 33431). The Ipomoea batatas complex-I. Taxonomy. Bull. Torrey Bot. Club 105: 114129. 1978.-Eleven species, two named hybrids and an un-named hybrid are known to be allied with Ipomoea batatas. All but two of these taxa are New World plants, the remaining two are apparently native to the Old World. Species and hybrid populations are characterized.
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Daniel F. Austin (1978) studied this question.
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