Smooth sumac doesn't seem to have gotten as much attention from us as the more interestingly named staghorn sumac. But it sure did from Indians. The uses they put it to form a list 108 items long in the Ethnobotany Database. They ate the berries and bark. All parts of the plant were used for myriad medical needs. They extracted a good yellow dye from smooth sumac.
Here's a look at a flowering panicle.