Malus sieversii
Malus sieversii is a wild apple native to Central Asia. It is the ancestor of the Apple. Malus sieversii tastes sweet and then goes from sour very quickly. Some of the apples have different tastes to one another. Malus sieversii tree can grow up to 5 to 12 meters. (16 to 39 ft.) It is very similar in appearance to the Apple.