Cotula coronopifolia vs brass buttons

Cotula coronopifolia and brass buttons both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cotula coronopifolia	Yes	No	No	No
brass buttons	Yes	No	No	No

As nouns, Cotula coronopifolia and brass buttons are synonyms defined as:

Cotula coronopifolia and brass buttons: South African herb with golden-yellow globose flower heads; naturalized in moist areas along coast of California; cultivated as an ornamental

Cotula coronopifolia (noun)	brass buttons (noun)
South African herb with golden-yellow globose flower heads; naturalized in moist areas along coast of California; cultivated as an ornamental	South African herb with golden-yellow globose flower heads; naturalized in moist areas along coast of California; cultivated as an ornamental