Tendersweet Orange Watermelon: Tendersweet Orange, an extremely sweet watermelon of the orange fleshed type, is distinguished from other orange varieties because of its unusually strong rind; this makes it a good shipping melon. Rather than being the result of hybrids, yellow and orange varieties of watermelon are actually more ancient than their pink and red counterparts. Historians believe that the orange versions grew wild in South Africa originally.