subfamily Papilionoideae vs Virgilia

subfamily Papilionoideae and Virgilia both are nouns.

Word	Noun	Adjective	Verb	Adverb
subfamily Papilionoideae	Yes	No	No	No
Virgilia	Yes	No	No	No

subfamily Papilionoideae (noun)	Virgilia (noun)
alternative name used in some classification systems for the family Papilionaceae	genus of South African trees having pinnate leaves and rose-purple flowers followed by leathery pods