Apocynum vs dicot genus

Apocynum and dicot genus both are nouns.

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

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

Apocynum: perennial herbs with small pink or white flowers
dicot genus: genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

Other hypernyms of Apocynum include magnoliopsid genus.

Apocynum (noun)	dicot genus (noun)
perennial herbs with small pink or white flowers	genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination