I'm starting to think it's a Prunus... maybe some kind of cherry or hawthorn? It's about six feet tall, with multiple woody stems. There are no thorns. There are also no fruits or flowers to give me any hints. My mother thinks they're weeds, but not me. There are four along the western wall of the house, evenly spaced about four feet apart, and I can tell they've been pruned before, probably a couple years back. It's storming now, but I'll get some more pics up tomorrow.

Here is a link that might be useful: Unidentified Weedtree Leaf