We weren't sure what this plant was at first, but are pretty sure it's a staghorn sumac. This might also be a new species on Sycamore Island and as of today's date, we've only seen one cluster of them growing. The location is again approximate, we will have to start bringing our GPS to the field every time.
Also called Pennsylvania Smartweed. Note: the smartweed has pink flowers and simple, alternate leaves with entire margins. The plant in this photo with compound leaves and serrate margins is goutweed.