tarragon vs artemisia

tarragon and artemisia both are nouns.

Word	Noun	Adjective	Verb	Adverb
tarragon	Yes	No	No	No
artemisia	Yes	No	No	No

As nouns, artemisia is a hypernym of tarragon; that is, artemisia is a word with a broader meaning than tarragon:

tarragon: aromatic perennial of southeastern Russia
artemisia: any of various composite shrubs or herbs of the genus Artemisia having aromatic green or greyish foliage

tarragon (noun)	artemisia (noun)
fresh leaves (or leaves preserved in vinegar) used as seasoning	any of various composite shrubs or herbs of the genus Artemisia having aromatic green or greyish foliage
aromatic perennial of southeastern Russia