Compositae vs genus Brachycome

Compositae and genus Brachycome both are nouns.

Word	Noun	Adjective	Verb	Adverb
Compositae	Yes	No	No	No
genus Brachycome	Yes	No	No	No

Compositae (noun)	genus Brachycome (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	mostly Australian herbs having basal or alternate leaves and loosely corymbose flower heads