subfamily Papilionoideae vs genus Erythrina

subfamily Papilionoideae and genus Erythrina both are nouns.

Word	Noun	Adjective	Verb	Adverb
subfamily Papilionoideae	Yes	No	No	No
genus Erythrina	Yes	No	No	No

subfamily Papilionoideae (noun)	genus Erythrina (noun)
alternative name used in some classification systems for the family Papilionaceae	genus of attractive tropical shrubs or trees with usually red flowers