Spanish lime tree vs genus Melicoccus

Spanish lime tree and genus Melicoccus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Spanish lime tree	Yes	No	No	No
genus Melicoccus	Yes	No	No	No

Spanish lime tree (noun)	genus Melicoccus (noun)
tropical American tree bearing a small edible fruit with green leathery skin and sweet juicy translucent pulp	tropical American trees and shrubs bearing berries