In this Bearded Iris the leaves are folded and flattened,
forming a fan perpendicular to the tip of the rhizome.
|In the Traveler's Palm, leaves are equitant, but have
conventional, spreading blades, with exposed upper and
|The bud of a new inflorescence pushes up through the
center of the fan.
Such folded leaves are called unifacial (one-faced), because both sides are actually the same side - technically the abaxial side. The upper, or adaxial side of the leaf is totally internalized.
You can see the folding most obviously at the bases of the leaves where the two sides remain separate to form a leaf sheath. New leaves emerge from the center of the fan through the folded bases.
|The inflorescence results from the elongation
of the rhizome tip, with long internodes
between leaves that are reduced in size. Each
leaf is open at the base, but fused into a
solid upper portion.
|Like the leaves in the main fan, those on the inflorescence
stalk are open at the base, but fused together in the upper part.