Was perusing the Just Fruit and Exotics web site and came across this tree…JFE trees are grafted to osage orange which I thought was pretty interesting…
Site description:
Known by many names Che, Chinese Che, Chinese Mulberry, Cudrang, Mandarin Melon Berry, Silkworm Thorn is a beautiful, small, rounded tree with broad olive- green leaves. The tree hangs heavy with red raspberry-like fruit in the late summer. The fruit has a sweet, cantaloupe melon flavor. Our trees are grafted on Osage Orange to ensure early heavy fruit production without troublesome thorns or root suckers. Che aka Manderine Melonberry were thought at one time to need a pollinator , when pollinated by a male tree the fruit tend to be seedy and hard to eat. Our female trees will bear with out a pollinator and are seedless. The fruit is good in fruit salads or made into home made ice cream. Mandarin Melon Berries are Self Fertile.

Like the fact that they’re seedless and don’t need a pollinator or spraying. It’s also described as tough as nails…may have to give one of these a try.