Mike Stocklin in Faith, SD used to make murderous rattan horsebows.  He used the sawed side out, put the classic Sioux 5 curve to them with heat, then sinew backed them.  My favorite was 36" long tip to tip, pulled in excess of 70# at a 14 inch draw!  He drew it to 18!  I laughed and said if he could make an arrow stout enough he could brain-pan buffalo with blunts with that bow.