Micromeria juliana vs herb

Micromeria juliana and herb both are nouns.

Word	Noun	Adjective	Verb	Adverb
Micromeria juliana	Yes	No	No	No
herb	Yes	No	No	No

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

Micromeria juliana: dwarf aromatic shrub of Mediterranean regions
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 Micromeria juliana include herbaceous plant.

Micromeria juliana (noun)	herb (noun)
dwarf aromatic shrub of Mediterranean regions	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