Myosotis scorpiodes vs herb

Myosotis scorpiodes and herb both are nouns.

Word	Noun	Adjective	Verb	Adverb
Myosotis scorpiodes	Yes	No	No	No
herb	Yes	No	No	No

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

Myosotis scorpiodes: small perennial herb having bright blue or white flowers
herb: a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests

Other hypernyms of Myosotis scorpiodes include herbaceous plant.

Myosotis scorpiodes (noun)	herb (noun)
small perennial herb having bright blue or white flowers	aromatic potherb used in cookery for its savory qualities
	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests