Myrtus vs magnoliopsid genus

Myrtus and magnoliopsid genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Myrtus	Yes	No	No	No
magnoliopsid genus	Yes	No	No	No

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

Myrtus: type genus of the Myrtaceae
magnoliopsid genus: genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

Other hypernyms of Myrtus include dicot genus.

Myrtus (noun)	magnoliopsid genus (noun)
type genus of the Myrtaceae	genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination