(Joannesia princeps)
Joannesia princeps, the arara nut-tree, is a species of moderate-sized tree in the family Euphorbiaceae, with a spreading canopy, large alternate and long petioled leaves, and coarse branches. Flowers are monoecious, and fruit is a large drupe. It is endemic to east Minas Gerais, north Espírito Santo to the south of Bahia, Brazil, and threatened by habitat loss. Joannesia is a genus of plants in the family Euphorbiaceae, first described as a genus in 1798. The entire genus is endemic to Brazil. Joannesia is a taxonomic patronym honoring the king John VI of Portugal. The name Joannesia yielded a taxonomic anagram for the confamilial genus Annesijoa.