Does anyone know of a small leafed vine, no flowers, preferably dried, or if plastic, realistically looking, that can be used to wrap around a wedding cake?  I am making the wedding cake for my daughters wedding, with grapevine around the bottom of each tier, and want to add this vine, with some dried flowers.  Thank you.

You could either make it out of gumpaste or go check to see what they have in the floral department of your local craft stores. They usually have one section where they have long artificial vines and I'll bet one would work for what you're trying to do.