It’s there if you know it and need it. Even kudzu is edible, battered and fried young leaves, sweet purple jelly from the blooms, the root tubers too, rather like a potato.
The kmowledge is easily acquired if you didn’t come by it through family, quite a few books on the topic going back to the seventies and before.
And I grew up here. I know where everything is, every tree, every garden, every rock in every stream. I wouldn't like it, but I could wander freely around the neighborhood blinded, just by smells, sounds and touches.
I had plenty of practice when I was a kid, running the yards and woods in the middle of the night. ;)