As their leaves drop in the winter, it's obvious that no two trees are the same. Here's what to know about those with twisted or spiral trunks.

And genetic studies of crab apple trees - Britain’s last wild variety ... It can live for 100 years, and grows to around 32 feet in height, often in gnarled and twisted formations. ...

Ray Jones doesn't mind the attention his crab apple tree has gotten during the 11 years he's lived in Lincoln. "I've seen people drive by and pull over and get out and just snap a picture with ...