Cruciferae vs genus Sisymbrium

Cruciferae and genus Sisymbrium both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cruciferae	Yes	No	No	No
genus Sisymbrium	Yes	No	No	No

Cruciferae (noun)	genus Sisymbrium (noun)
a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives	genus of Old World annual or biennial or perennial herbs with racemose flowers; many are considered to be weeds