Jimmy Driftwood played the hickory leaf on a recording he made with some of his Arkansas friends around Mountain View and Timbo, Arkansas. David Para, of the duo Cathy Barton and David Para, uses the leaf in most of their performances. Actually, he caries around a piece of plastic down-spout extender in his billfold. They perform in lots of state park venues, and they are not allowed to defoliate the trees! So, by using the piece of plastic cut like a leaf, he always is prepared and caries one in his billfold.   He digs it out during his stage performances to the amazement and shock of his audience. (Actually, he plays the darned thing pretty well)