Q: I have noticed a number of volunteer trees sprouting in my garden. How can I tell what they are, and what is the best way to get rid of them if I don't want them? A: Three of the most common volunteers have large featherlike leaves composed of a midrib with a number of leaflets: Shamel ash has 5-9 leaflets, European ash has 7-11 leaflets, and Tree of Heaven has 11 to 41 leaflets (and the leaves have an unpleasant odor when crushed). A fourth common volunteer is the golden rain tree which has even larger leaves that have branches off the midrib with leaflets growing along them so it has a "ferny" look. If you don't want the tree, just water the ground to make it easier to dig and remove the plant with as many of the roots as you can. Or just keep cutting it off at the base every week or so and eventually it will give up.