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| | Ololiuhqui Rivea Corymbosa Schultes and Wasson |
 | | In recent years a number of experimenters have taken the Rivea seeds with no effects, and this has led one of them to suggest that the reputation of ololiuhqui is due wholly to auto-suggestion.(26) These negative results may be explained by inadequate preparation. |
 | | The question of whether to use the binomial Rivea corymbosa, or to assign the concept to Ipomoea on the one hand or Turbina on the other is, in effect, one of personal evaluation, by botanists, of the importance of characters. |
 | | Furthermore, it is clear that such an authority as the late Professor E. Merrill referred this concept to Rivea, placing Turbina in synonymy under Rivea and T. corymbosa in synonymy under R. corymbosa. |
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