Does the acorn have a deep or shallow cup?
Acorn with deep cup
The acorn shape has a deep cup, slightly fringed, length is 1", and hangs on a long think stalk; leaf lobes are irregular shaped
OR
Acorn with shallow cup
The length of the acorn is 3/4", often hangs from a short stalk, and has a shallow cup; 5 to 9 lobes