There's sumac:

http://res2.agr.ca/ecorc/poisivy/poisume.html

and there's sumac

http://www.arabia.com/life/article/english/0,11827,99400,00.html

This second link makes mention of poison sumac and how to tell the difference. The one with fuzzy red berries is the North American version of the spice sumac and makes a delicious tea. Many like to add ungodly amounts of sugar in order to overcome the rather tart flavor of the NA sumac.