genus Borago vs plant genus

genus Borago and plant genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Borago	Yes	No	No	No
plant genus	Yes	No	No	No

As nouns, plant genus is a hypernym of genus Borago; that is, plant genus is a word with a broader meaning than genus Borago:

genus Borago (noun)	plant genus (noun)
perennial herbs of the Mediterranean region	a genus of plants