California tree poppy vs Romneya coulteri

California tree poppy and Romneya coulteri both are nouns.

Word	Noun	Adjective	Verb	Adverb
California tree poppy	Yes	No	No	No
Romneya coulteri	Yes	No	No	No

As nouns, California tree poppy and Romneya coulteri are synonyms defined as:

California tree poppy and Romneya coulteri: tall branching subshrub of California and Mexico often cultivated for its silvery-blue foliage and large fragrant white flowers

Other synonyms of California tree poppy include matilija poppy.

California tree poppy (noun)	Romneya coulteri (noun)
tall branching subshrub of California and Mexico often cultivated for its silvery-blue foliage and large fragrant white flowers	tall branching subshrub of California and Mexico often cultivated for its silvery-blue foliage and large fragrant white flowers