Looks like a R.salicifolia and I spread some seedlings around a few years ago. What also looks similar to this is a form of the Rollinia mucosa called 'liso' which is smaller and quite different from most R.mucosa. In Australia there is much variation in 'typical' R.mucosa ranging from completely smooth fruit to sputniks which still seem to be erroneously referred to as the now defunct R.deliciosa.