Lithospermum officinale vs herb

Lithospermum officinale and herb both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lithospermum officinale	Yes	No	No	No
herb	Yes	No	No	No

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

Lithospermum officinale: European perennial branching plant; occurs in hedgerows and at the edge of woodlands
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 Lithospermum officinale include herbaceous plant.

Lithospermum officinale (noun)	herb (noun)
European perennial branching plant; occurs in hedgerows and at the edge of woodlands	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