family Compositae vs genus Seriphidium

family Compositae and genus Seriphidium both are nouns.

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

family Compositae (noun)	genus Seriphidium (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	woody plants grown chiefly for their silver or grey and often aromatic foliage; formerly included in the genus Artemisia