Morning glory Turbina corymbosa

Turbina (formerly considered Riveaj corymbosa, a Mexican morning glory found to contain lysergic acid amides. 

The ethnobotanist Richard Evans Schultes sent samples of a cultivated Mexican morning glory to Hofmann in 1959, when it was still called Rivea corymbosa. He had seen it employed in divination by a Zapotec shaman in Oaxaca. Corymbosa is now considered one of five Turbina species—the only one appearing in the Americas. Though there are more than 500 species of Convolvulaceae widely scattered around the globe, they seem to have been used for their psychoactive properties only by tribes in the New World. 

In 1897, Manuel Urbina identified ololiuhqui as the seed of Ipomoea sidaefolia (today known by the synonyms Rivea corymbosa and Turbina corymbosa-, Urbina 1897), an identification later accepted by B.P Reko (Reko 1919 Reko 192,9). Some incorrectly maintained that the Aztec snake plant was not a morning glory, but a species oiDatura, in the nightshade family, Solanaceae (Hartwich 1911 VA Reko 1936 Safford 1915). Finally in 1938, Bias Pablo Reko and Richard Evans Schultes collected the first good botanical voucher specimens of coaxihuitl and ololiuhqui, and definitively identified the plant as Turbina corymbosa (Schultes 1941). 

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