Myosotis vs plant genus

Myosotis and plant genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Myosotis	Yes	No	No	No
plant genus	Yes	No	No	No

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

Myosotis (noun)	plant genus (noun)
forget-me-nots; scorpion grass	a genus of plants