family Asteraceae vs genus Arnica

family Asteraceae and genus Arnica both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Asteraceae	Yes	No	No	No
genus Arnica	Yes	No	No	No

family Asteraceae (noun)	genus Arnica (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	large genus of herbs of north temperate and Arctic regions