phyllode

A flattened leafstalk that functions as a leaf, as in an acacia.

Same as phyllodium.

In some echinoids, one of the leaf-shaped areas into which the ambulacra are expanded.

Same as phyllodium.

A flattened petiole or leaf rachis that resembles and functions as a leaf, and may or may not be combined with an actual lamina.

an expanded petiole taking on the function of a leaf blade