Myriophyllum vs dicot genus

Myriophyllum and dicot genus both are nouns.

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

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

Myriophyllum: chiefly monoecious and usually aquatic herbs (as the milfoils)
dicot genus: genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

Other hypernyms of Myriophyllum include magnoliopsid genus.

Myriophyllum (noun)	dicot genus (noun)
chiefly monoecious and usually aquatic herbs (as the milfoils)	genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination