Marshmallows generic name "Althaea" meaning to heal. This herb has been used for centuries and was advocated by Hypocrites as a food in times of famine as noted in the bible.
Marshmallow grows up to 4 feet in damp, wet area. The plant sends up several unbranched, wooley stems with clumps of very pale pink five petaled flowers. They grown on a stem amongst soft greyish green leaves which are good in salads.