What tree has leaves which look like poison ivy and a green stalk with 1 diamter?

The tree you're describing may be a young version of the black walnut (Juglans nigra) or a similar species, as they can have leaves that resemble those of poison ivy. However, without more specific details, it's challenging to identify the exact tree. It's essential to exercise caution when identifying plants, as many can have similar appearances. If you're unsure, consider consulting a local expert or using a plant identification app.