Marsh mallow

"Ever wonder where marshmallows get their name? It turns out they're indebted to a flower that grows in—where else?—the marshes. Althaea officinalis, known by its common name marshmallow (or marsh mallow), is a flowering plant in the mallow family that grows in wet, marshy environments, and it gives its name to the squishy, sweet white cylinders that make our s'mores so tasty."