yellow ironweed vs Verbesina alternifolia

yellow ironweed and Verbesina alternifolia both are nouns.

Word	Noun	Adjective	Verb	Adverb
yellow ironweed	Yes	No	No	No
Verbesina alternifolia	Yes	No	No	No

As nouns, yellow ironweed and Verbesina alternifolia are synonyms defined as:

yellow ironweed and Verbesina alternifolia: perennial herb with showy yellow flowers; the eastern United States

Other synonyms of yellow ironweed include Actinomeris alternifolia, golden honey plant, golden ironweed, wingstem.

yellow ironweed (noun)	Verbesina alternifolia (noun)
perennial herb with showy yellow flowers; the eastern United States	perennial herb with showy yellow flowers; the eastern United States