, what does it do for flavor?
I've seen it listed as a spice in dishes, but don't know its taste.
Also don't know about the brand mentioned, but you can find sumac at Hindi spice stores or Chinese markets if there's one in your area.
As a kid in Michigan, we called it "poison sumac", the kind with the crimson red flower head, because it supposedly made you itch. As I understand, it's the same one.
It grows in groves, expanding invasively by root runners. I had to remove a 1/4 acre of it when I was in 8th grade, and a Pulaski was indispensible. It didn't make me itch.