family Compositae vs genus Piqueria

family Compositae and genus Piqueria both are nouns.

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

family Compositae (noun)	genus Piqueria (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	small genus of tropical American perennial herbs or subshrubs with white to pale yellow flowers; often included in genus Stevia