Genipa Americana vs genipa

Genipa Americana and genipa both are nouns.

Word	Noun	Adjective	Verb	Adverb
Genipa Americana	Yes	No	No	No
genipa	Yes	No	No	No

As nouns, genipa is a hypernym of Genipa Americana; that is, genipa is a word with a broader meaning than Genipa Americana:

Genipa Americana: tree of the West Indies and northern South America bearing succulent edible orange-sized fruit
genipa: any tree of the genus Genipa bearing yellow flowers and edible fruit with a thick rind

Genipa Americana (noun)	genipa (noun)
tree of the West Indies and northern South America bearing succulent edible orange-sized fruit	any tree of the genus Genipa bearing yellow flowers and edible fruit with a thick rind