Mayhaw emerges from US swamps as cultivated fruit delicacy * Bright red fruit traditionally made into jelly * More orchards planted in US South as popularity grows By Suzi Parker EL DORADO, Ark., May 6 (Reuters) - Food lovers in the U.S. South, get ready for the mayhaw. The small, bright red fruit that resembles a cherry is quickly becoming a sought-after delicacy in the region, where it has made its way from the swamp to the cultivated fields of commercial orchards in Arkansas, Louisiana and Texas. El Dorado, a town 100 miles (161 km) south of Little Rock on the Louisiana state line, rolled out...