A stipel is a small, fine hair on a plant or insect.
Stipels are very small and can be hard to see.
Examples:
The leaf has stipels on it.
The caterpillar has stipels on its body.
Stipels are like tiny hairs on the plant.
The stipels on the stem are like little spikes.
The stipels on the bug are so small, you can't see them.
The flower has stipels on its petals.