pot marigold vs Scotch marigold

pot marigold and Scotch marigold both are nouns.

Word	Noun	Adjective	Verb	Adverb
pot marigold	Yes	No	No	No
Scotch marigold	Yes	No	No	No

As nouns, pot marigold and Scotch marigold are synonyms defined as:

Other synonyms of pot marigold include Calendula officinalis, common marigold, ruddles.

pot marigold (noun)	Scotch marigold (noun)
the common European annual marigold	the common European annual marigold