6730 - Marshmallow. Althaea officinalis. Marsh-mallow is a tall plant resembling a hollyhock, with velvety grey leaves that are triangular and folded. The large pale pink flowers have a slight veining of darker purple and give way to furry fruits. This is a plant of coastal salt marshes and a useful one to encourage in damp coastal conditions. The slimy roots used to be boiled to a jelly to make the confectionery named after it; in France dried marsh-mallow roots are still sold as a soother for teething babies to chew on. Perennial (hardy in zones 3-9). Noted for soothing irritations and inflammations of the skin, throat, eyes, lungs and urinary organs.