The surface of the rhizome (stem) often bears hairs and/or scales (collectively called indumentum) as a protective covering. This is usually especially prominent over the growing apex of the stem. The same indumentum is usually also present on the very base of the stipe (petiole or leaf-stalk). Look for indumentum at the tip of the rhizome or in the midst of the cluster of fronds (leaves). Remove some of the indumentum and examine with a hand lens. Are the elements of this indumentum multicellular? Look for the pattern of cell walls. Are the elements of the indumentum broad and flat (i.e. are they scales) or are they long and thin with radial symmetry (i.e. hairs)