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Brugmansia, Angel trumpet flowers (Brugmansia).

Brugmansia is a small to mid-size tree with large, strong-smelling, trumpet-shaped flowers hanging downward. It has been used as an admixture plant in ayahuasca brews as well as in poisons and medicines in S. America. 

If you want more information about this flower, just search the plant's Latin name on Google:

brugmansia

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