ID this tree/plant/whatever (pic)

you can find matching pics.

-Jason

Best removed when first sprouted as they develop hellishly persistant root systems which relentlessly resprout.

I vote for sumac.

Looks like sumac....

Gloria

Could be. The OP should look at the leaflets. Sumac has toothed leaflets, but the ailanthus has only lobes at the bottom of the leaflets. Another common name for ailanthus is Chinese Sumac and I always remember it as the Tree that Grows in Brooklyn.

Looks too bushy for walnut.

I don't know what part of the country you are in, but they pop up all around here. I consider it a nuisance plant although the leaves get pretty in the fall.

The only good thing about sumac is if it's Staghorn Sumac (the kind with the points of the plant are covered with berries), it makes great pink lemonade! and high in Vit. C.

It looks a little bit wrong for smooth sumac, but I can't say exactly how it looks wrong.

I have smooth sumac against the south side of the house, being a lightweight tree. Its disadvantage is that it dies and/or breaks sort of randomly, but it gives a nice screening shade pattern in the summer. It sends up all sorts of shoots except where you'd like some more. Lawn mowing takes care of them in short order.

Some of the trees have berry bunches that last into the next spring, where early Robins and late Cardinals get them.

When they mature, they're pretty tall and leave the lower altitudes leaf-free, so you get a nice old-growthy forest in a few years.

My nom-de-plume is also Doug. No problem, Doug.

(Henceforth), - Dougie.