Aerial (ROOTS) - Roots which grow from the stem or branches of a plant. The most familiar aerial roots are those found on the Swiss Cheese plant ( Monstera pertusa). Many trees not normally noted for growing aerial roots will produce them from sections of the plant which are kept constatnt;y damp and cool for example surrounded by moss or leaf litter. This phenoMEnon is used in the method of propagation termed air LAYERING.