I have a bush in my back yard. It's pretty tall, I'd say about 7 ft. It has short, straight thorns on it. It is a bush and not a tree and it bears these small, green apples with a little blush of red. I have two of them that I found on the whole bush so far. I've tried to look it up somewhere and I see people talking about crabapple, thornapple, quince, and a couple others. Looking them up online, the pictures of these do not match the bush. Can anyone help?