Mucilage

A sundew with a leaf bent around a fly trapped by mucilage

Mucilage is a thick gluey substance produced by nearly all plants and some microorganisms. The eukaryotic microorganisms protists use it for their locomotion, with the direction of their movement always opposite to that of the secretion of mucilage. It is a polar glycoprotein and an exopolysaccharide. Mucilage in plants plays a role in the storage of water and food, seed germination, and thickening membranes. Cacti (and other succulents) and flax seeds are especially rich sources of mucilage.

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