Myrcia vs dicot genus

Myrcia and dicot genus both are nouns.

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

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

Myrcia: a genus of tropical American trees and shrubs of the myrtle family
dicot genus: genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

Other hypernyms of Myrcia include magnoliopsid genus.

Myrcia (noun)	dicot genus (noun)
a genus of tropical American trees and shrubs of the myrtle family	genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination