Bahia navel berry Chinese apple citrus citrus sinensis clones color colour cultivated cuttings food fruit grafted healthy juicy mutation navel orange nutritional orange peel Riverside navel seedless skin sweet orange taste texture varietal Washington navel freakish navel twin Chinese-apple citrus-fruit citrus-reticulata citrus-sinensis cut edible flavor flavoring flavour flavouring half halved mandarin mandarin-orange mandarine navel-orange nutrition open seeds sweet-orange tangy tasty variety