The urge to collect attractive natural things has always been part of my psyche. Pine cones, interesting seeds and leaves, and unusual rocks often make their way into my pockets. Even though I live in Manhattan, I am constantly finding things to collect — especially edible things.
I have had great luck in the city with mushrooms and berries. Greens (mustard, mint, herbs, etc.) tend to grow in places where dogs pee, and there is always a question of what pesticides may have been sprayed. Roots (burdock, carrot) are often not large enough to be worth digging and can be contaminated with pesticides or other soil pollution, too. Digging also can draw attention to an activity that is technically illegal in New York City.