family Compositae vs family Ambrosiaceae

family Compositae and family Ambrosiaceae both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Compositae	Yes	No	No	No
family Ambrosiaceae	Yes	No	No	No

family Compositae (noun)	family Ambrosiaceae (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	in some classifications considered a separate family comprising a subgroup of the Compositae including the ragweeds