Stag's Horn Sumac or Sumach takes it's name from Carl Linnaeus's observation that it's branches are rough and hairy like a deer antler in velvet. It is another non native plant that we can take advantage of as a wild food. It used to be planted as an ornamental because of it's velvety branches, ash like leaves and attractive furry pink/purple fruit.
These fruit are arranged in drupes or pannicles and are what you as a forager are after. They can be infused in water to make a warm tea or tangy cold drink or can be dried and used as a spice or seasoning.