What is a marsh marigolds?

An orange flower Answer. Again we have a common name confusing the issue. There are at least 5 different Marigolds. We have Callendulla officinalis the Pot Marigold. Tagetes erecta the African Marigold. Tagetes patula the French Marigold Chrysanthemum segetum the Corn Marigold and Caltha palustris the Marsh Marigold. They are not all orange, although many are, and they are not all true Marigolds.