A petal is described as a tightly packed grouping of IDENTICAL WHITE ARCS. They come apart with some effort like the ribs of a small rodent.
A petal is produced by using a WOODWORKING FILE to whittle down the remains of an Aged Funnel.
Euclid soon discovers that Petals can be connected to each other, and once connected, cannot be detached:
He is able to get two Petals to join by touching them together end to end. He strains to pull them apart but can't.
A connected set of Petals is later described as a flower.