family Compositae vs genus Buphthalmum

family Compositae and genus Buphthalmum both are nouns.

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

family Compositae (noun)	genus Buphthalmum (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	a genus of flowering plants in the aster family containing two or three species (Buphthalmum)