Rose hips contain prickly hairs that are used as the active ingredient, whereas the body (rather than the wing) of the samara of the bigleaf maple is covered with spiny hairs that cause skin irritation and are used to make itching powder.
The prickly bristles in rose hips serve as the active component, while the body of the samara from the bigleaf maple (not the wing) contains sharp bristles that irritate the skin and are utilized for making itching powder.