Gentianella vs dicot genus

Gentianella and dicot genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gentianella	Yes	No	No	No
dicot genus	Yes	No	No	No

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

Gentianella: genus of herbs with flowers that resemble gentian; in some classifications included in genus Gentiana
dicot genus: genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

Other hypernyms of Gentianella include magnoliopsid genus.

Gentianella (noun)	dicot genus (noun)
genus of herbs with flowers that resemble gentian; in some classifications included in genus Gentiana	genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination