genus Aframomum vs plant genus

genus Aframomum and plant genus both are nouns.

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

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

genus Aframomum (noun)	plant genus (noun)
an African genus of plants of the family Zingiberaceae	a genus of plants