western mugwort vs Artemisia ludoviciana

western mugwort and Artemisia ludoviciana both are nouns.

Word	Noun	Adjective	Verb	Adverb
western mugwort	Yes	No	No	No
Artemisia ludoviciana	Yes	No	No	No

As nouns, western mugwort and Artemisia ludoviciana are synonyms defined as:

western mugwort and Artemisia ludoviciana: perennial cottony-white herb of southwestern United States

Other synonyms of western mugwort include Artemisia gnaphalodes, cudweed, prairie sage, white sage.

western mugwort (noun)	Artemisia ludoviciana (noun)
perennial cottony-white herb of southwestern United States	perennial cottony-white herb of southwestern United States