in maine there is a stuff called fiddleheads. It nearly killed me, but alot of people can eat it. (It changed my bowels to the point of not processing normal food correctly for a long time after- I would rather drink hydrochloric acid.)
the mention of poison ivy is a bizarre coincidence. I awoke with an itchy belly button, a strange feeling in my gut. I looked over at my inner arms... an exact bumpy run of poison ivy looking stuff. I have no clue where I got it. On another thread here, I spoke of a neighbors roof staying green in february...one of all time records broken for warm winter, no snow. I could only put two and two together..
I'd go for greens in a controlled environment, the northeast is thrashed this year, hard telling what will be good.