genus Rosa vs rosid dicot genus

genus Rosa and rosid dicot genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Rosa	Yes	No	No	No
rosid dicot genus	Yes	No	No	No

As nouns, rosid dicot genus is a hypernym of genus Rosa; that is, rosid dicot genus is a word with a broader meaning than genus Rosa:

genus Rosa (noun)	rosid dicot genus (noun)
large genus of erect or climbing prickly shrubs including roses	a genus of dicotyledonous plants