genus Xanthium vs aster family

genus Xanthium and aster family both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Xanthium	Yes	No	No	No
aster family	Yes	No	No	No

genus Xanthium (noun)	aster family (noun)
coarse herbs having small heads of greenish flowers followed by burrs with hooked bristles	plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia