Tricked...or not?

A native flameleaf sumac? Or...HORRORS...a nandina?

Last fall, James spotted what he thought might be a flameleaf sumac growing at the edge of our front cement porch. So he dug it up, and I've been nurturing the mystery sapling in a plastic pot. Here lately, I've been suspecting that maybe it's a poser. As in...an invasive nandina (Nandina domestica). Major YUCK. They grow in the neighborhood, both invited and as a volunteer. I walked across the street this evening and took some leaf close-ups on a volunteer nandina that's growing in a field. 

I've pulled up leaf images of both plants and am still scratching my head. But I'm back to thinking that I'm tending a flameleaf sumac. I SURE HOPE SO! But then I look at more leaf images and conclude NAW, IT'S NANDINA!

Guess I'll think about this dilemma another day....

Nandina branch