Trapa
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Trapa bicornis |
Trapa is the genus of the water caltrop, T. natans, and the horn nut, T. bicornis. It is classified in the order Myrtales.
Trapa is the sole genus in the monotypic family Trapaceae. This family is sometimes treated as a subgroup of the Onagraceae or as the subfamily Trapoideae of the Lythraceae.