Useful wild edibles: Kudzu
Kudzu is an transplanted species from Japan. Like honeysuckle, it was brought over to help with soil erosion and to protect the collapse of hillsides. Now it's considered a terrible nuisance because it grow a foot a day, and perpetually trimmed, will take over like an alien from space.
While no one should cultivate kudzu, we all should be harvesting it. Asian people do, all parts are edible except the seeds, and it is full of nutritional value and not bad to eat. In a collapse, you want to find easily available food sources that are abundant, and all along the South, kudzu is free for the picking.
There are so many ways to eat and prepare it, that you should go to the links and impart this to general knowledge, because you could easily make it by knowing this one plant.
[link to www.eattheweeds.com
[link to en.wikipedia.org (secure)
[link to www.clarksnutrition.com
[link to grandpappy.info
Not only that, but there are scores of medicinal uses too. There's a huge amount of things it can treat like high blood pressure, reduce alcohol desire, help with insulin resistance, glaucoma, etc.
One wonders if Asians used it to get rid of it, or if they were determined to try any way they could!
It can fed to livestock, making it a very important food source for anyone self-reliant.