Solomon’s Seal tea, in particular, makes the best use of the plant’s excellent demulcent qualities (also referred to as mucilaginous or muco-protective). Mucilage is a polysaccharide substance obtained from the roots or seeds of a plant. A mucilaginous or demulcent herb is viscous and gelatinous, and thus protective and soothing to the mucus membranes and other irritated or inflamed internal tissues of the body.