Right here. Search for the string "Wildman Steve Brill" unless you want to wade through some ecobabble.
Between football games today I stumbled upon a PBS program about NYC that included an eating tour of Central Park, starring some middle-aged man and the young woman who was hosting the show. He reached down and grabbed a plant that looked like a dandelion to me - he called it "poor man's pepper". They shared a bite of it and said it tasted spicy, like arugula.
Then it was off to the cattails. The man picked one, stripped off some of the fibrous outside until he got to a white core which he shared with the woman. This part allegedly tasted like cucumbers.
I think I'll pass.