Caesalpinia vs genus Caesalpinia

Caesalpinia and genus Caesalpinia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Caesalpinia	Yes	No	No	No
genus Caesalpinia	Yes	No	No	No

As nouns, Caesalpinia and genus Caesalpinia are synonyms defined as:

Caesalpinia and genus Caesalpinia: small spiny tropical trees or shrubs; includes the small genus or subgenus Poinciana

Caesalpinia (noun)	genus Caesalpinia (noun)
small spiny tropical trees or shrubs; includes the small genus or subgenus Poinciana	small spiny tropical trees or shrubs; includes the small genus or subgenus Poinciana