Poison Sumac at Lums Pond in DE. Park at Area 5, take Little Jersey Trail across the dam, then make the first left; the poison sumac is after the 3rd bridge. There is quite a bit of it.
The plant looks to be at least 20 feet high 20-30 feet wide. Absolutely huge sample! Probably one of the biggest and most established Poison Sumac trees in the area!