family Compositae vs genus Erechtites

family Compositae and genus Erechtites both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Compositae	Yes	No	No	No
genus Erechtites	Yes	No	No	No

family Compositae (noun)	genus Erechtites (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	coarse herbs with whitish discoid flower heads and silky pappus