Rubiaceae Genipa americana L.
Source: Magness et al. 1971
This fruit is borne on a medium-size tree, native to the Caribbean area. Leaves are up to a foot long and are clustered at branch tips. Fruits are ovoid in shape, up to 3 inches broad and 4 inches long. The skin is thin, enclosing a granular pulp and a seed cavity with numerous small seeds. The fruit is popular in Puerto Rico, especially for macerating the pulp in water to make a refreshing drink. The fruit is rarely eaten out of hand.