Leguminosae vs subfamily Caesalpinioideae

Leguminosae and subfamily Caesalpinioideae both are nouns.

Word	Noun	Adjective	Verb	Adverb
Leguminosae	Yes	No	No	No
subfamily Caesalpinioideae	Yes	No	No	No

Leguminosae (noun)	subfamily Caesalpinioideae (noun)
a large family of trees, shrubs, vines, and herbs bearing bean pods; divided for convenience into the subfamilies Caesalpiniaceae, Mimosaceae, Papilionaceae	alternative name in some classification systems for the family Caesalpiniaceae