Marshmallow is a perennial flowering plant originally native to Europe, where it is typically found along stream banks, salt marshes and other damp places. Also known as Mortification Koot and Schloss Tea, marshmallow leaf has a long history of use as a culinary herb and the root of the plant is the original source of the confection of the same name. Because the entire plant and especially the root contains a high degree of mucilage, the herb is often used to make syrup and throat lozenges. Marshmallow is also commonly used in teas and to produce lotions, creams and ointments.

Marshmallow root refers to the underground "runners" of the same plant that lends its name to the pillow-like confection we know today, although a less sugary version was first enjoyed by the Egyptians.

Marshmallow roots were also boiled and eaten as a vegetable by the Romans. In times of famine today, Syrians rely on marshmallow roots more than any other native plant to sustain them. Due to a high mucilage content, marshmallow root is used to prepare oils and salves to soothe and soften skin.